Expository articles
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Found total 226 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 1938 times last on 19 June 2026, 11:57 pm
(Downloaded 1938 times last on 19 June 2026, 11:57 pm
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 3564 times last on 19 June 2026, 10:24 pm
(Downloaded 3564 times last on 19 June 2026, 10:24 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 1857 times last on 18 June 2026, 07:20 am
(Downloaded 1857 times last on 18 June 2026, 07:20 am
24
Compact Spaces
Proves Heine-Borel theorems in $R$, $R^n$ and Tykonoff's theorem.
Keywords :
M.Sc.
MTTS Level :
MTTS Level :
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(Downloaded 1437 times last on 16 June 2026, 08:39 pm
(Downloaded 1437 times last on 16 June 2026, 08:39 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 2603 times last on 18 June 2026, 03:20 am
(Downloaded 2603 times last on 18 June 2026, 03:20 am
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 2312 times last on 18 June 2026, 02:17 pm
(Downloaded 2312 times last on 18 June 2026, 02:17 pm
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 1855 times last on 19 June 2026, 10:10 am
(Downloaded 1855 times last on 19 June 2026, 10:10 am
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 1697 times last on 19 June 2026, 07:44 am
(Downloaded 1697 times last on 19 June 2026, 07:44 am
29
Complex Analysis: Handout-2 (Results on Power Series)
Results on power series
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MTTS Level :
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(Downloaded 2561 times last on 19 June 2026, 02:31 pm
(Downloaded 2561 times last on 19 June 2026, 02:31 pm
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 1870 times last on 19 June 2026, 05:07 pm
(Downloaded 1870 times last on 19 June 2026, 05:07 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 1371 times last on 17 June 2026, 09:19 pm
(Downloaded 1371 times last on 17 June 2026, 09:19 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 1725 times last on 19 June 2026, 10:39 pm
(Downloaded 1725 times last on 19 June 2026, 10:39 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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(Downloaded 1965 times last on 19 June 2026, 10:22 pm
(Downloaded 1965 times last on 19 June 2026, 10:22 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 7012 times last on 20 June 2026, 01:00 am
(Downloaded 7012 times last on 20 June 2026, 01:00 am
35
Construction of real numbers
Construction of real numbers
Keywords :
B.Sc./M.Sc
MTTS Level :
MTTS Level :
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(Downloaded 1931 times last on 18 June 2026, 01:58 pm
(Downloaded 1931 times last on 18 June 2026, 01:58 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 1242 times last on 18 June 2026, 04:05 am
(Downloaded 1242 times last on 18 June 2026, 04:05 am
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
MTTS Level :
MTTS Level :
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(Downloaded 2379 times last on 20 June 2026, 01:07 am
(Downloaded 2379 times last on 20 June 2026, 01:07 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 1202 times last on 19 June 2026, 07:30 pm
(Downloaded 1202 times last on 19 June 2026, 07:30 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.
MTTS Level :
MTTS Level :
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(Downloaded 1018 times last on 18 June 2026, 08:08 pm
(Downloaded 1018 times last on 18 June 2026, 08:08 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 1659 times last on 16 June 2026, 12:39 pm
(Downloaded 1659 times last on 16 June 2026, 12:39 pm