Mathematics
André Caldas's user avatar
André Caldas's user avatar
André Caldas's user avatar
André Caldas
  • Member for 11 years, 11 months
  • Last seen this week
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About

PhD student at UnB.

Fond of free software and freedom of knowledge. :-)

You can contact me at:
[email protected]

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Top posts
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All Questions Answers
Score Newest
answer
62
Is it faster to count to the infinite going one by one or two by two?
Feb 3, 2014
answer
54
Intuitively, how should I think of Measurable Functions?
Mar 28, 2012
answer
34
Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
Oct 13, 2011
answer
25
Is the following proof valid? About the closure of a subgroup, of a topological group, being again a subgroup
Nov 23, 2011
question
23
Direct approach to the Closed Graph Theorem
Apr 27, 2012
question
23
Open Mapping Theorem: counterexample
Jan 31, 2013
answer
14
Intuition for an open mapping
Feb 13, 2014
question
10
Krein-Smulian counterexample for the weak (not *) topology.
May 7, 2017
answer
10
Why does $a^n - b^n$ never divide $a^n + b^n$?
Oct 11, 2011
question
9
Topology for convergent sequences
May 19, 2013
Top network posts
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30
Examples of common false beliefs in mathematics
13
System with invariant measure, but no ergodic measure.
12
Supremum amongst Kolmogorov-Sinai entropies: ergodic or just invariant measures.
7
Partitioning $\beta \mathbb{Z} \setminus \mathbb{Z}$
6
locally connected versus locally compact

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