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Mathematics
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Omar's user avatar
Omar's user avatar
Omar
  • Member for 11 years, 8 months
  • Last seen more than 11 years ago
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Although I am still an undergraduate at UCSB, I am highly enjoying graduate math classes and have been allowed to follow a few depending on the teachers. Unfortunately I find myself having to teach myself a lot of known knowledge to many of my unofficial class mates. Thank you for all your help.

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9
Using Zorn's lemma show that $\mathbb R^+$ is the disjoint union of two sets closed under addition.
Nov 25, 2012
8
Proof that$ (a+A)\cap A=\varnothing$ if $A$ is countable
Dec 4, 2012
5
The cofinality of $\aleph_{\omega\cdot9+3}$
Nov 25, 2012
4
Metric spaces and sets.
Mar 19, 2013
3
The product of the finite non-zero ordinals, and the product of the finite non-zero cardinals.
Nov 25, 2012
3
If the von Neumann rank $x$ is less than that of $y$, is $x\in y$?
Nov 25, 2012
3
Decreasing sequence of ordinals must stabilize
Nov 25, 2012
3
study inside a finite-dimensional inner product space.
Mar 18, 2013
3
containment in a cantor set
Mar 19, 2013
2
How to show the following equality of ordinal exponentiation: $n^{\omega^\omega}=\omega^{\omega^\omega}$?
Nov 25, 2012