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METHODS FOR SOLVING MATHEMATICAL PROBLEMS USING
ARTIFICIAL INTELLIGENCE
Kaynarov Fazliddin Zarif
o’g’li
,
Economics and Pedagogical University, Non-State Educational Institution,
Mathematics Department, 3rd year student,
Orcid ID: 0009-0009-9677-1849;
Annotation.
The article shows that solving mathematical problems can be
more effectively implemented using artificial intelligence (AI) than traditional
methods. Artificial intelligence, in particular neural networks and deep learning
(Deep Learning) methods, significantly simplify and accelerate the process of solving
mathematical and statistical problems. This work considers the application,
capabilities and practical approaches of artificial intelligence methods in solving
mathematical problems.
Keywords:
Artificial intelligence, neural networks, deep learning (Deep
Learning), regression, classification, optimization, simulation, differential equations,
machine learning, genetic algorithms, mathematical modeling, error functions,
physics-Informed Neural Networks (PINNs).
Аннотация.
В статье показано, что решение математических задач
может быть более эффективно реализовано с использованием искусственного
интеллекта (ИИ), чем традиционными методами. Искусственный интеллект,
в частности нейронные сети и методы глубокого обучения (Deep Learning),
значительно упрощают и ускоряют процесс решения математических и
статистических задач. В данной работе рассматриваются применение,
возможности и практические подходы методов искусственного интеллекта
при решении математических задач.
Ключевые слова:
Искусственный интеллект, нейронные сети, глубокое
обучение (Deep Learning), регрессия, классификация, оптимизация,
моделирование,
дифференциальные
уравнения,
машинное
обучение,
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генетические алгоритмы, математическое моделирование, функции ошибок,
физико-информированные нейронные сети (PINN).
Complex problems, such as regression, classification, and optimization, can
be solved using neural networks, evolutionary algorithms, genetic algorithms, and
other machine learning methods. These methods help to identify ambiguous and
complex relationships between input and output data. Artificial intelligence methods
are also effectively used in complex problems such as simulation, optimization, and
differential equations.
Methods for solving mathematical problems using artificial intelligence are
currently very popular and are used in many different fields. These methods can be
divided into the following main areas:
• Genetic algorithms and simulation methods can be effective for solving
mathematical problems. For example, in complex optimization problems, the best
solution can be found using genetic algorithms or simulation methods (Monte Carlo
simulation).
Simulation and optimization are widely used methods in the fields of artificial
intelligence and mathematics, which help in solving many real-world problems. Let's
take a closer look at each of these two concepts:
Simulation is the process of creating a real or theoretical model of a system or
process and testing its behavior or performance on a computer. This method is used
to understand systems or processes, predict them, or make decisions.
• Monte Carlo Simulation: This method allows you to test the behavior of a
system using probability distributions. Monte Carlo simulation is a method for
modeling the behavior of a system using random numbers. It is used, for example, to
model or predict random processes.
• Agent-based simulation: In this method, the system is represented by
different agents (such as people, machines, or other objects). Each agent learns its
own behavior to create the overall behavior of the system. The agents interact with
each other and simulate the system.
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• Dynamic simulation: This method aims to simulate how a system changes
over time. For example, it is used to model economic or ecological systems.
Differential equations and integrals can be used to analyze the change in a system
over time.
Helps to understand the behavior of complex systems.
Allows you to study processes or problems that are difficult to test in practice.
Allows you to quickly test many alternative solutions.
Can be computationally and time-consuming.
Models and approaches may not fully reflect reality.
In some cases, the necessary data for creating a model may not be available.
Optimization is the process of finding the best (optimal) solution for a system
to achieve a specific goal. This process requires the use of various algorithms and
mathematical models. Optimization is used in many areas, such as manufacturing,
transportation, marketing, economics, and others.
Linear Optimization. In this type of optimization, the objective function and
constraints are linear. For example, it is used in the allocation of resources in
production, minimizing costs, or maximizing profits. The simplex algorithm is one of
the most popular methods for linear optimization.
Nonlinear Optimization: If the objective function or constraints are nonlinear,
then nonlinear optimization methods are used. Solutions to such optimization
problems are found using gradient methods or heuristic methods.
Integer Optimization: In this type of optimization, the variables must be
integers. For example, it is used in logistics problems when choosing freight transport
routes or in the allocation of resources in the production process.
Genetic Algorithms: Genetic algorithms (GAs) are heuristic methods that
mimic the processes of natural selection and heredity. These algorithms are useful in
solving complex optimization problems because they help solve global optimization
problems better than local optimization.
Helps find the most efficient and economical solution to the problem.
Allows for efficient allocation of resources and maximum benefit.
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Effective in developing solutions for complex systems.
Solutions may not be guaranteed to be exact or global, especially in
nonlinear and discrete optimization.
Longer computation time and increased resource requirements when
working with large data sets.
Integration of simulation and optimization
The combination of simulation and optimization is used in many practical
problems. For example, by simulating complex systems or processes, it is possible
to study their behavior and then improve the system using optimization algorithms.
Examples:
• Optimization of transportation networks: When optimizing large
transportation networks or logistics systems, simulation can be used to test different
scenarios, and then the best transportation routes can be selected using optimization.
• Manufacturing processes: In manufacturing systems, simulation can be
used to create different production situations to allocate resources efficiently, and
production can be effectively controlled using optimization methods.
Simulation and optimization are very effective tools in artificial intelligence
and mathematical modeling. Simulation helps to analyze the behavior of systems,
while optimization is used to develop solutions to achieve maximum system
efficiency. Using these two methods together gives effective results in solving many
complex problems.
Artificial neural networks (ANNs) or decision trees can be used to model
and solve linear and nonlinear problems. For example, ANNs can be used to find a
solution to a system.
Linear and nonlinear algebra are important branches of mathematics, widely
used in many fields, including physics, economics, engineering, and computer
science. Both concepts are fundamental tools in analyzing systems and finding
solutions. Let's take a closer look at these two areas.
Linear algebra is the branch of mathematics that studies vectors, matrices,
and linear functions. The most common concepts in this field are vectors, matrices,
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determinants, and vector fields. Linear algebra is widely used in mathematical
modeling and optimization problems.
Objects that represent the direction and length of a line. Vectors often exist
in n-dimensional spaces such as Rn.
In linear algebra, matrices are rectangular arrays of numbers or other objects.
Matrices can be used to find solutions to systems, transform vectors, and represent
linear transformations.
They are used to determine the properties of a matrix. For example, the
determinant helps determine the inverse of a matrix.
Linear algebra solves equations such as Ax = b, where A is a matrix, x is a
vector, and b is a resultant vector.
Gaussian elimination: A method used to solve a system of linear
equations. This method helps to find a solution by reducing matrices to their
simplest form.
Eigenvalues and Eigenvectors: Eigenvalues and eigenvectors are
fundamental concepts in linear algebra and physics. These concepts are used to
analyze the properties of a matrix. An eigenvalue is a scalar value that leaves the
matrix unchanged, while an eigenvector is a vector that leaves the matrix
unchanged.
• Linear transformations: Used to transform vectors or spaces. For example,
operations such as rotation or scaling are considered linear transformations.
Optimization problems: Linear algebra is very important in linear
optimization problems (such as the Simplex algorithm).
Physics: Linear algebra is used to model quantum mechanics,
electrodynamics, and other physical systems.
Machine learning: Models are built using vectors and matrices in regression
analysis and classification problems.
Nonlinear Algebra
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Nonlinear algebra, on the other hand, is a more complex and broader field
than linear algebra, and focuses on the study of nonlinear behavior of systems. It is
used to analyze nonlinear equations, nonlinear functions, and complex systems.
Nonlinear equations: Unlike linear equations, nonlinear equations study
nonlinear relationships between variables and objective functions. For example, they
may contain nonlinear elements such as polynomials, exponential functions, or
logarithms.
Nonlinear functions: Many functions in nonlinear algebra describe nonlinear
relationships. For example, functions such as y = x² or y = sin(x) are considered
nonlinear.
Gradient and optimization: The concept of gradient (e.g., gradient descent
algorithms) is used to optimize nonlinear systems. These methods lead systems to
the minimum or maximum value (minimization or maximization).
Newton's methods: These methods are used to find solutions to systems of
nonlinear equations. Newton's method allows you to quickly find a solution if the
initial value is close.
Gradient methods: In nonlinear optimization, for example, the descent
method is used. In this method, the lowest point is reached along the gradient of the
objective function.
Gauss-Seidel methods: Approximating methods for nonlinear systems
Stability analysis of systems: Nonlinear algebra is used to analyze the stability of
systems, that is, how they respond to changes over time. This is important in
modeling physical systems or economic systems.
Machine learning: Nonlinear algebra is used in nonlinear regression,
artificial neural networks (ANNs), and other complex models. For example, the
activation function for a neural network is often nonlinear.
Physics and Engineering: Nonlinear algebra is used to model many physical
processes, such as the deformation of various materials or temperature changes.
Linear algebra provides easy and accurate solutions to systems and
equations. It often expresses simple relationships between systems.
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Nonlinear algebra, on the other hand, models complex systems, such as
dynamical systems and many physical processes. In this area, solutions are more
iterative and approximate.
Linear and nonlinear algebra are two main areas of mathematics and are
used in many fields. Linear algebra is usually used to work with simple systems and
equations, while nonlinear algebra is used to model and optimize complex and
dynamical systems. Both areas are essential tools for mathematical modeling and
problem solving.
Deep learning can be used to learn mathematical functions and generate
solutions based on them. For example, deep learning technologies can be used to
solve differential equations or matrices.
Learning mathematical functions using neural networks is one of the few
interesting and practical applications of machine learning. Neural networks can be
used to learn mathematical functions, that is, to predict the output of a mathematical
function based on its input values. This process is especially useful in regression
problems, since regression models are designed to predict continuous values based
on input variables. The main goal of learning a mathematical function using neural
networks is to determine the output of a function given the input data. This means,
for example, imagining some functions that resemble mathematical equations or
formulas.
The architecture of a neural network for learning a mathematical function
can be in the following simple form:
Input Layer: This layer contains the input values of the function, i.e., x (for
example, f(x) or y = f(x)).
Hidden Layers: These layers perform the learning of the neural network.
They help to extract complex features from the input data.
Output Layer: In this layer, the neural network produces its final output, i.e.,
the result of the mathematical function.
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When learning mathematical functions, the neural network learns the
relationship between the input data (x) and the output data (y). This process usually
consists of the following steps:
Input data is prepared: The input values, i.e., the x values, and their
associated output values, y, are collected.
How a neural network works:
The neural network processes the input data receives and passes it through
hidden layers.
In each layer, the input values are processed using weights and biases.
In the output layer, the network produces an output of a mathematical
function.
Backpropagation: The network tries to find the initial solution. Then the
error is calculated and the weights are updated using backpropagation. This process
is needed to train the network.
Final output: The output of the network is the mathematical function learned
with the updated weights after the backpropagation process.
Simple Function (For example, f(x) = x²)
Suppose we need to learn the function f(x) = x². The neural network training
for this function can be of the following form:
• Input data: x (for example, 1, 2, 3, 4, 5)
• Output data: y = x² (1, 4, 9, 16, 25)
A neural network can be configured as follows:
1. The input layer contains the values of x.
2. Through hidden layers, the network learns patterns of the function x².
3. The output layer produces the result y = x².
If our goal is to learn the function sin(x), a neural network can help in
learning complex functions such as sin(x). For example:
• Input data: x (e.g. 0, π/2, π, 3π/2, 2π)
• Output data: y = sin(x)
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The learning process of a neural network consists of determining the
relationship between x and sin(x).
3. Training the model and evaluating the results
To train a neural network to learn a mathematical function, the following
steps must be performed:
1. Training set: Create a training set containing the input and output data.
2. Training the model (Training): Train the neural network using the training
set. In this process, the network optimizes the weights and learns the relationships
between the data.
3. Testing the model (Testing): Evaluate the individual results of the model
using the test set and check its generalization capabilities.
4. Error Analysis: Evaluate the accuracy of the model and, if necessary, re-
optimize or retrain the network.
4. Practical Examples and Construction
For example, using Python and the TensorFlow or Keras libraries, you can
train a neural network to learn mathematical functions. In the following example,
we create a neural network trained to learn the function f(x) = x²:
Python Example (with TensorFlow or Keras):
import jumpy as np
import tensorflow as tf
from tensorflow import keras
from tensorflow.keras import layers
# Creating training data
X = np.linspace(-10, 10, 1000) # Incoming x values
y = X ** 2 # Output y = x^2
# Model creation
model = keras.Sequential([
layers.Dense(64, activation='relu', input_dim=1), # 1-layer
layers.Dense(64, activation='relu'), # 2-layer
layers.Dense(1) # Output layer
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]) # Compiling the model
model.compile(optimizer='adam', loss='mean_squared_error')
# Model training
model.fit(X, y, epochs=100, batch_size=32)
# Forecasting using a model
predictions = model.predict(np.array([5])) # x = 5
print(f"f(5) = {predictions[0][0]} (model output)")
Network evaluation
Evaluate the model and analyze its error rate using the test set:
# Creating test data
X_test = np.linspace(-10, 10, 100)
y_test = X_test ** 2
# Testing the model
test_loss = model.evaluate(X_test, y_test)
print(f"Test Loss: {test_loss}")
The process of learning mathematical functions using neural networks can
be very effective in predicting complex functions. A neural network helps to
identify complex relationships between data by learning mathematical relationships.
This method is widely used in regression problems and analyses based on complex
mathematical models.
• Simulation methods and neural networks can be used to solve complex
differential equations using artificial intelligence. This method is especially used in
physics and engineering problems.
Solving differential equations using artificial intelligence is one of the
interesting and practical applications of modern technologies. Differential equations
are widely used to express mathematical models, but solving them using traditional
methods can sometimes be difficult. Artificial intelligence (AI), in particular neural
networks and deep learning methods, are offering new and effective approaches to
solving differential equations.
Traditional methods for solving differential equations:
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• Analytical solutions: It is possible to find exact solutions for some simple
differential equations. For example, there are analytical solutions (formulas) for
them.
• Numerical methods: Numerical methods (e.g., Euler's method, Runge-
Kutta method) are widely used to solve differential equations. These methods are
very efficient, but often require a lot of calculations for high accuracy.
However, sometimes differential equations are complex and uncertain, and it
is difficult to find solutions using traditional methods. This is where artificial
intelligence and neural networks come to the rescue.
2. Solving Differential Equations Using Neural Networks
Neural networks use the function learning method to solve differential
equations. Artificial intelligence, especially using deep learning, is used to model
and learn the solution to a differential equation.
Physics-Informed Neural Networks (PINNs)
PINNs are a type of artificial intelligence used to solve differential
equations. PINNs find solutions by studying physical laws, that is, the structural
properties of differential equations. They usually work in conjunction with
differential equations and constraint conditions.
The main principle of PINN:
• In PINN, a neural network is trained to find the exact solutions to a
differential equation. The network is based on learning the differential equation and
its constraint conditions.
• The network learns time and space coordinates as input data, and the
solution to the equation (for example, u(t,x)u(t, x)) as output data.
• To train the model, an error function is constructed, which is used to
approximate the exact solution to the equation. The error is calculated mainly using
the differential equation, initial and boundary conditions.
The following steps are performed to solve differential equations using
PINN:
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Define the differential equation: For example, an ordinary, especially
inverse, differential equation:
𝜕𝑢
𝜕𝑡
=
𝜕
2
𝑢
𝜕𝑥
2
(1)
This equation models the distribution of temperature in time and space.
2. Build a neural network: Build a neural network architecture in the model.
The neural network takes time (t) and spatial coordinates as inputs and produces the
solution of the equation u(t, x) as output.
3. Train the neural network: Train the model using backpropagation. During
the training process, the PINN calculates errors and optimizes the differential
equation, initial and constraint conditions.
4. Solve: After training and training the model, the solution can be predicted
in time and space.
• Multidimensional systems: PINNs are very effective in solving complex,
multidimensional differential equations, as they model higher-dimensional systems
better than traditional methods.
• Constraint handling: NNNs work effectively with initial and constraint
conditions, which is important for solving differential equations.
• Accuracy: Neural networks can learn well from ambiguous and complex
solutions to differential equations.
For example, let's try to solve the diffusion equation as follows:
𝜕𝑢(𝑥,𝑡)
𝜕𝑡
=
𝜕
2
𝑢(𝑥,𝑡)
𝜕𝑥
2
(2)
This equation represents the diffusion of the material, where u(x,t) is the
concentration of the substance, and D is the diffusion coefficient.
A PINN model can be built as follows:
1. Input: coordinates tt and xx.
2. Output: concentration u(x,t).
3. Error function:
Residual error: The output of the model is u(x,t)u(x,t) and this value is
approximated to zero.
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Constraint conditions: Initial and constraint conditions (for example,
u(0,t)=0, u(x,0)=f(x)).
To train the model and solve the differential equation, we start the training
process by providing input data to PINN.
Build PINN using Keras or TensorFlow
python
import tensorflow as tf
from tensorflow import keras
from tensorflow.keras import layers
import numpy as np
# Model creation
class PINN_Model(tf.keras.Model):
def __init__(self):
super(PINN_Model, self).__init__()
self.dense1 = layers.Dense(50, activation='tanh')
self.dense2 = layers.Dense(50, activation='tanh')
self.dense3 = layers.Dense(1)
def call(self, inputs):
x, t = inputs
x = tf.concat([x, t], axis=1)
x = self.dense1(x)
x = self.dense2(x)
return self.dense3(x)
# Model creation
model = PINN_Model()
# Compilation
model.compile(optimizer='adam', loss='mean_squared_error')
# Training the created model and solving differential equations
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Solving differential equations using artificial intelligence, in particular
Physics-Informed Neural Networks (PINNs), is an effective and powerful approach.
These methods help solve complex systems, multidimensional problems, and
constraint conditions compared to traditional numerical methods. PINNs can
provide accurate and efficient solutions to differential equations, for example, in the
calculation of physical models or in scientific research.
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