Expository articles
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Found total 227 results. Displaying results from 21 to 40.
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21
Noncontractibility of the Circle
Non-contractibility of the circle and Brouwer Fixed point theorem in $R^2$. Proofs are analytic in nature, as we classify the functions into punctured plane.
Keywords :
M.Sc.
MTTS Level :
MTTS Level :
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(Downloaded 2069 times last on 20 August 2026, 02:08 am
(Downloaded 2069 times last on 20 August 2026, 02:08 am
22
Simple and Direct Proofs of Some Results in the Theory of Compact Spaces
Simple and direct proofs of some results in the theory of compact spaces.
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Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 3861 times last on 22 August 2026, 04:46 pm
(Downloaded 3861 times last on 22 August 2026, 04:46 pm
23
Compact Metric Spaces
Give equivalent conditions for a metric space to be compact
Keywords :
Final year BSc, 1st year MSc
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(Downloaded 1883 times last on 20 August 2026, 08:19 am
(Downloaded 1883 times last on 20 August 2026, 08:19 am
24
Compact Spaces
Proves Heine-Borel theorems in $R$, $R^n$ and Tykonoff's theorem.
Keywords :
M.Sc.
MTTS Level :
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(Downloaded 1480 times last on 19 August 2026, 02:30 pm
(Downloaded 1480 times last on 19 August 2026, 02:30 pm
25
Properties Equivalent to the LUB Property of Ordered Fields
Properties equivalent to LUB property. Almost similar to the article ?complete1.pdf? but contains an example of complete non-Archimedean field.
Keywords :
Final year B.Sc,, M.Sc.
MTTS Level :
MTTS Level :
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(Downloaded 2645 times last on 19 August 2026, 03:20 pm
(Downloaded 2645 times last on 19 August 2026, 03:20 pm
26
Properties Equivalent to the LUB Property of Ordered Fields
Properties equivalent to LUB property. Almost similar to the article ?complete.pdf?, but contains more details but excludes an example of complete non-Archimedean field.
Keywords :
Final year B.Sc, M.Sc
MTTS Level :
MTTS Level :
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(Downloaded 2522 times last on 22 August 2026, 05:35 am
(Downloaded 2522 times last on 22 August 2026, 05:35 am
27
A Diagnostic Quiz in Complex Analysis
A diagnostic quiz in complex analysis.
Keywords :
M.Sc.
MTTS Level :
MTTS Level :
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(Downloaded 1986 times last on 20 August 2026, 09:35 pm
(Downloaded 1986 times last on 20 August 2026, 09:35 pm
28
Complex Analysis: Handout-1 (Basic Calculus on C)
A handout dealing with limits, differentiation of functions from $R$ to $C$, from 4C$ to $C$ and integartion of $C$-valued continuous funtions on $[a,b]$.
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 1718 times last on 20 August 2026, 09:39 pm
(Downloaded 1718 times last on 20 August 2026, 09:39 pm
29
Complex Analysis: Handout-2 (Results on Power Series)
Results on power series
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MTTS Level :
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(Downloaded 2613 times last on 21 August 2026, 12:00 am
(Downloaded 2613 times last on 21 August 2026, 12:00 am
30
Complex Analysis: Handout-3 (Cauchy-Riemann Equations)
Cauchy-Riemann equations
Keywords :
it also brings out the `geometric' meaning of C-R equations. A must read for students who like geometry.
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MTTS Level :
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(Downloaded 1952 times last on 21 August 2026, 10:27 pm
(Downloaded 1952 times last on 21 August 2026, 10:27 pm
31
Complex Analysis: Handout-7 (Path Integrals)
Path integrals
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 1396 times last on 14 August 2026, 07:56 pm
(Downloaded 1396 times last on 14 August 2026, 07:56 pm
32
Complex Analysis: Handout-7 (Properties of Holomorphic Functions
Properties of holomorphic functions. No proofs.
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 2169 times last on 14 August 2026, 02:10 pm
(Downloaded 2169 times last on 14 August 2026, 02:10 pm
33
Complex Analysis: Handout-8 (Weierstrass Theorem)
Weierstrass theorem on uniform convergence (on compact subsets) of holomorphic functions.
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 2234 times last on 18 August 2026, 07:26 pm
(Downloaded 2234 times last on 18 August 2026, 07:26 pm
34
Connected and Path-connected Spaces
A quick introduction to connected and path-connected spaces. More details may be found in my book on metric spaces.
Keywords :
Final year B.Sc, M.Sc
MTTS Level :
MTTS Level :
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(Downloaded 7659 times last on 22 August 2026, 06:15 pm
(Downloaded 7659 times last on 22 August 2026, 06:15 pm
35
Construction of real numbers
Construction of real numbers
Keywords :
B.Sc./M.Sc
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MTTS Level :
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(Downloaded 2004 times last on 20 August 2026, 09:48 pm
(Downloaded 2004 times last on 20 August 2026, 09:48 pm
36
Banach Contraction Principle
Proofs of Banach's contraction mapping theorem and its applications to ODE and integral equations.
Keywords :
Final year B.Sc, M.Sc
MTTS Level :
MTTS Level :
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(Downloaded 1276 times last on 20 August 2026, 09:49 pm
(Downloaded 1276 times last on 20 August 2026, 09:49 pm
37
Correspondence Theorem for Groups
Proves the stated result with a nontrivial application (which is missing in standard textbooks).
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 2653 times last on 23 August 2026, 03:42 am
(Downloaded 2653 times last on 23 August 2026, 03:42 am
38
Covering Spaces
Basic notions of covering spaces with emphasis on topological manifolds.
Keywords :
M.Sc.
MTTS Level :
MTTS Level :
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(Downloaded 1301 times last on 22 August 2026, 12:14 pm
(Downloaded 1301 times last on 22 August 2026, 12:14 pm
39
Existence of Continuous Logarithms
Proves the existence of continuous logarithms on star-shaped domains in $R^n$ with values in $C^*$. As an application, gives a proof of no-retraction theorem.
Keywords :
M.Sc.
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MTTS Level :
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(Downloaded 1063 times last on 13 August 2026, 11:27 pm
(Downloaded 1063 times last on 13 August 2026, 11:27 pm
40
A Continuous but Nowhere Differentiable Function
Establishes the existence of a continuous nowhere differentiable function in a seriesof graded exercises. Rest assured it is easy!
Keywords :
Final year B.Sc, M.Sc
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MTTS Level :
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(Downloaded 1707 times last on 20 August 2026, 02:23 pm
(Downloaded 1707 times last on 20 August 2026, 02:23 pm