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1823
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visits member for 2 years, 3 months
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I'm a student of mathematics in Germany.


19h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
added 49 characters in body
19h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
added 21 characters in body
19h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
added 21 characters in body
19h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
tried to clarify the argument
19h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
edited body
20h
revised Every sequence in $\mathbb{R}$ has a monotonic subsequence
added a possibility to fix the argument
2d
revised How to show $\mathbf{Q} $ is not free
added the non-finitely-generated part
2d
revised How to show $\mathbf{Q} $ is not free
added 8 characters in body
Dec
15
revised Proving that a function is absolutely monotonic on a given interval
added 3 characters in body
Dec
13
revised Finding polynomial generators in a subspace
cleaned up tex code
Dec
12
revised Notation $x^n=(x_1,\dotsc,x_n)$
edited tags
Dec
12
revised Noetherian ring not descending chain condition
replaced non-working tex-code
Dec
11
revised Let $R=M_n(D)$, $D$ is a division ring. Prove that every $R-$simple module is isomorphic to each other.
minor correction
Dec
11
revised Let $R=M_n(D)$, $D$ is a division ring. Prove that every $R-$simple module is isomorphic to each other.
elaborated the answer
Dec
6
revised showing the natural numbers exist from axioms (help with making sense of book)
corrected mistakes, removed typos
Dec
6
revised showing the natural numbers exist from axioms (help with making sense of book)
clarified lemma, corrected tex
Dec
5
revised Proof about direct sum of vector spaces
added 16 characters in body
Nov
29
revised Is there a general notion of orientability, e.g. for the rationals?
specified question
Nov
25
revised Instructive sources for arguing without elements
edited tags
Nov
16
revised is $f(x)=x^4 +x^3 +x^2 +x +1$ irreducible in $R=(\mathbb Z/7\mathbb Z)[x]$?
included note/warning