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Category: Mathematics

Certificate Differential Equations Part I Basic Theory

My 166th course certificate from Coursera

Posted on October 30, 2024October 30, 2024 by keslerzhu

Differential Equations Part I Basic Theory Korea Advanced Institute of Science and Technology It is impossible to appreciate the beauty of mathematics without knowing differential equations, nor become and qualify as a skillful engineer. You probably have begun studying them ever since high school. This course provides basic terminologies, concepts, and methods of solving various…

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Certificate Mathematics for Engineers: The Capstone Course

My 164th course certificate from Coursera

Posted on September 30, 2024September 30, 2024 by keslerzhu

Mathematics for Engineers: The Capstone Course The Hong Kong University of Science and Technology This course is the apex of the entire specialization. It is truly a rewarding journey. I am so excited to learn some basic concepts in computational fluid dynamics (CFD), and to visualize fluid flow around a cylinder with MATLAB. Math is…

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Certificate Numerical Methods for Engineers

My 162nd course certificate from Coursera

Posted on September 2, 2024September 30, 2024 by keslerzhu

Numerical Methods for Engineers The Hong Kong University of Science and Technology This is an excellent course to consolidate your mathematics knowledge with Matlab programming skills. In real life it is usually extremely difficult to find roots, compute quadrature, or solve ordinary differential equations. It is critical to gain the skills to effectively use Matlab….

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Certificate Combinatorics and Probability

My 160th course certificate (with honors) from Coursera

Posted on July 27, 2024July 27, 2024 by keslerzhu

Combinatorics and Probability US San Diego You may already have some experience that, in daily life, brute force by counting items one-by-one is almost the worst method to find the the you want. A mathematical field called combinatorics is a powerful tool to help you think before getting your hand dirty. Moreover a solid grasp…

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Certificate Vector Calculus for Engineers

My #81 course certificate from Coursera

Posted on December 26, 2021September 2, 2024 by keslerzhu

Vector Calculus for Engineers The Hong Kong University of Science and Technology We can’t emphasize enough the importance of Vector Calculus. A solid understanding lays the foundations for further learning of electromagnetism, fluid mechanics and many disciplines. This course is one of the best I have met. I can’t help but recommend to those who…

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Certificate Differential Equations for Engineers

My #80 course certificate from Coursera

Posted on December 17, 2021October 19, 2022 by keslerzhu

Differential Equations for EngineersThe Hong Kong University of Science and Technology By highlighting both theories and applications in practice, this amazing course might be your excellent choice to grasp the differential equations in shortest time. You are actually learning math and physics at the same time, building your own mapping between the 2 disciplines. I…

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Gradient theorem, Conservative vector fields

Vector Calculus: Fundamental Theorems

Posted on December 15, 2021October 19, 2022 by keslerzhu

Gradient Theorem The fundamental theorem of single variable calculus was the one that told you “the integral of the derivative of a function is just going to be the function itself.” The gradient theorem is a generalization of the fundamental theorem of calculus to vector calculus, i.e. calculus of several variables. Suppose a scalar field 蠁, we could use…

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Line integrals of scalar fields, Line integral of vector fields

Line and Surface Integrals

Posted on December 13, 2021November 10, 2022 by keslerzhu

Line Integrals Scalar Fields We have a curve C in the x-y plane, we can represent a point on this curve then by a vector r. To do a line integral, we break the curve into small pieces ds, you have a small element of length ds and a value of f on that element, we multiply…

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Certificate Logic for Economists

My #79 course certificate from Coursera

Posted on December 12, 2021October 22, 2022 by keslerzhu

Logic for EconomistsUniversity of Amsterdam The logo of University of Amsterdam is cool, so is this succinct course. In this course you only experience black board, white chalk and the hushed tone of the professor. No distraction, you just focus on the “logic”! The course covers a few of the most basic concepts, they are…

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Fourier series

The Diffusion Equation of a Dye

Posted on December 9, 2021October 20, 2022 by keslerzhu

Fourier Series Sometimes complicated motions can actually be composed of motions of many different frequencies. The type of mathematical analysis that’s useful is called Fourier series. Fourier series is a way of representing a function – an infinite series of cosine and sines. You can view these as a linear superposition of waves of various frequencies. We use orthogonality…

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System of linear first order ODEs, Distinct real eigenvalues

Systems of Differential Equations

Posted on December 6, 2021October 22, 2022 by keslerzhu

Systems of Homogeneous Linear First-order ODEs The system of linear first order homogeneous equations can be written in matrix form. To solve it we’re going to use An ansatz X(t) = V e位t . We’re going to look for solutions of the ansatz. The principle of superposition. When we find solutions of the ansatz, we’ll multiply…

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Double triple integrals, Polar coordinates

Polar, Cylindrical, Spherical Coordinates

Posted on December 4, 2021November 14, 2022 by keslerzhu

Multidimensional Integration In Vector Calculus, we have to worry about integrating over two or three variables: double integrals or triple integrals. Double integral can be interpreted as a volume, like a single integral is the area under the curve. When the limits don’t depend on any variable, and we could do integrals separately. Polar coordinates Polar coordinates…

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Laplace transform

Laplace Transform and Series Solution Method

Posted on December 1, 2021October 19, 2022 by keslerzhu

Laplace transform Laplace transform is a technique for solving differential equations. By using the Laplace transform you can convert a differential equation into another space where the equation is easier to solve. Laplace transform is a linear transformation and it is invertible. The strength of the Laplace transform technique, is to solve the differential equations where you…

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Partial derivatives, Least squares, Chain rule, Triple product rule

From Partial Derivatives to Maxwell’s Equations

Posted on November 29, 2021October 22, 2022 by keslerzhu

Partial derivatives Partial derivative is to differentiate functions of multiple variables. Assume a function f = f(x, y), you are differentiating f with respect x, that is the usual definition of a derivative of a function of one variable, but y is held constant. There is something called mix partial. It does not depend on…

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Logic for Economists

Posted on November 27, 2021October 20, 2022 by keslerzhu

Propositional Logic A proposition (often denoted by capital letters P, Q, etc) is a statement, that can be either true or false. Its negation 卢P is obtained by prepending “it is not true that …” to P. If you negate twice, you get P back again: 卢(卢P) = P . Two propositions are equivalent P…

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