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I'm a student of mathematics in Germany.


Apr
26
comment Surjective Homomorphic map and orders
Can I downvote for bad jokes? : – /
Apr
26
revised Classification of semidirect products
changed the notation.
Apr
25
answered Classification of semidirect products
Apr
25
comment Classification of semidirect products
Where is this question coming from? Is this homework?
Apr
23
revised Pumping lemma contradiction
tex formatting
Apr
23
comment Pumping lemma contradiction
How about $b^pa^{p+1}$ instead?
Apr
23
revised Ring Properties
added 17 characters in body
Apr
23
answered Ring Properties
Apr
19
comment Algebra, Geometry and Algebraic Geometry
My understanding (probably naïve): Algebra deals with structures and equations, geometry deals with spaces and figures and algebraic geometry combines structures with spaces and equations with figures.
Apr
19
comment Lattice Definition
You should probably also ask for the origins of both notions and add the math-history-tag.
Apr
18
revised Classical geometry statement in modern terminology
added 192 characters in body
Apr
18
revised Classical geometry statement in modern terminology
added 192 characters in body
Apr
18
answered Classical geometry statement in modern terminology
Apr
14
comment compact open set?
Every compacet set in a metric space (or more generally a Hausdorff space) is closed in it. You certainly implied this, but I think it’s worth stating it explicitly.
Apr
13
comment Simply Connected Points in Disk
Do you mean $S^1$?
Apr
11
comment Is the length of the composition series of a free module identical to the number of its bases?
Thank you. I have the same issue (and therefore the same wording).
Apr
11
comment Is the length of the composition series of a free module identical to the number of its bases?
Can you tell me on which page you have found this? And can you tell me which version of Commutative Algebra you have? So I can look up to see if I have the same wording.
Apr
11
comment Is the length of the composition series of a free module identical to the number of its bases?
Okay, it seems to me that you are right. For $λ(M) = l(M)/l(A)$ it’ll work, though, wouldn’t it?
Apr
11
comment Is the length of the composition series of a free module identical to the number of its bases?
What are the $A_n$?
Apr
11
revised Finding the CFG (Context Free Grammar) of a language
edited body