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Found total 227 results. Displaying results from 121 to 140.

 
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121
Exercises in ODE

A set of preliminaries required for a first course in ODE and exercises (perhaps at senior undergraudate level).

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M.Sc.
MTTS Level :
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(Downloaded 934 times last on 20 August 2026, 10:57 pm
122
Outline of Group Theory

A complete course (with a lot of examples and exercises with just enough hints) in the theory groups leading up to Sylow's theorems.

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B.Sc
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(Downloaded 4359 times last on 13 August 2026, 01:34 am
123
Pancake Problems

An incomplete but with geometric ideas of the pancake problem

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M.Sc.
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(Downloaded 953 times last on 18 August 2026, 12:24 am
124
Sign of a Permutation

Gives a simple proof of the sign of permutations being a homomorphism.

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B.Sc
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(Downloaded 816 times last on 21 August 2026, 01:12 am
125
Partial Order, Total Order and Well-ordering

Gives a near-complete review of partial order, total order, maximal elements and maximum, Zorn's lemma and its equivalents, the typical uses (without proof) of Zorn's lemma.

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B.Sc
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(Downloaded 3144 times last on 23 August 2026, 08:12 am
126
Existence of Smooth Functions and Partition of Unity

Gives a proof o partition of unity in $R^n$ and uses it to prove that there exists a smooth map which is homotopic to any given continuous map. This corollary will be of use when we define concepts which are invariant under homotopy such as degree of a map or index of a loop.

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M.Sc.
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(Downloaded 1242 times last on 18 August 2026, 07:51 pm
127
Some Properties of Harmonic Functions

Establishes standard results such as the converse of the mean value property, Liouville's theorem and Harnack's inequality.

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M.Sc.
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(Downloaded 708 times last on 16 August 2026, 02:39 am
128
Proofs of Malgrange-Ehrenpreis Theorem

Aims to give different proofs of local solvability of PDO's with constant coefficient. INCOMPLETE

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Ph.D.
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(Downloaded 870 times last on 23 August 2026, 09:51 am
129
An Overview of the Theory of Linear PDE

This is a Very Biased Overview of PDE and Rough List of Recurrent Themes in PDE. It was written as answer to a senior mathematician who just wanted a bird's eyeview of the subject. This was written almost 2 decades ago and but still relevant.

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Ph.D.
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(Downloaded 731 times last on 19 August 2026, 10:20 am
130
First Order PDE — The Method of Characteristics

Explains the geometric ideas underlying the method of charatcteristics

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M.Sc.
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(Downloaded 1144 times last on 18 August 2026, 12:16 pm
131
Fundamental Solutions for PDO with Constant Coefficients

The aims of these notes are (i) to exhibit fundamental solutions of some of the classical differential operators, (ii) to prove the local solvability of constant differential operators and (iii) to outline a short proof of Malgrange-Ehrenpreis Theorem which asserts the existence of fundamental solutions for such operators. While they serve the purpose of giving very explicit and concrete fundamental solutions of operators of mathematical physics, such as Laplace, Heat and Wave , they also provide a good introduction to some of the ubiquitous tricks of hard-analysis in general, and PDE in particular.

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M.Sc./Ph.D
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(Downloaded 1409 times last on 21 August 2026, 08:29 am
132
Local Solvability of Constant Coefficient Differential Operators

It establishes the local solvability of constant coefficient partial differential operator using Hormander's a priori inequality.

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Ph.D.
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(Downloaded 727 times last on 08 August 2026, 10:34 am
133
Problems in the Method of Separation of Variables

Method of separation of variable.

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M.Sc.
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(Downloaded 711 times last on 15 August 2026, 08:03 pm
134
Classification of 2nd Order PDE

Classification of 2nd order PDE.

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M.Sc.
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(Downloaded 2065 times last on 14 August 2026, 08:58 pm
135
Higher Dimensional Poisson Equation

Higher dimensional Poisson/Lapalce equation.

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M.Sc.
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(Downloaded 653 times last on 13 August 2026, 04:58 pm
136
One Dimensional Wave Equation

One dimensional wave equation via graded exercises

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M.Sc.
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(Downloaded 1847 times last on 24 August 2026, 04:55 am
137
Higher Dimensional Wave Equation

Outline of the results on wave equations of higher dimensions, closely following McOwen's book (Sections 3.2 and 3.3)

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M.Sc.
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(Downloaded 821 times last on 22 August 2026, 02:50 am
138
Some Results about Heat Equation

Almost all classical results on heat equation, including maximum principles, uniqueness, Duhamel principle.

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M.Sc.
MTTS Level :
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(Downloaded 659 times last on 17 August 2026, 08:35 pm
139
Maximum Principle Heat Equation

Seems to be a subset of pde8_heat.pdf

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(Downloaded 1001 times last on 14 August 2026, 02:20 pm
140
Little Picard Theorem

Gives a proof of the little Picard theorem using uniformization theorem and covering spaces. It explains the geometric meaning of the classical proof which uses the modular function in the proof of the theorem.

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M.Sc.
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(Downloaded 1380 times last on 24 August 2026, 02:20 am