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Mathematics
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Ulrik's user avatar
Ulrik's user avatar
Ulrik
  • Member for 11 years, 7 months
  • Last seen more than 1 year ago
  • Norway
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9
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13
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14
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5
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7
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7
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22
Prove that the absolute value of a product is the product of the absolute values of factors.
Jan 10, 2014
10
Is this trig step correct?
Feb 15, 2014
10
Proof of identity $\sqrt {xy} = \sqrt x \sqrt y$ for $x,y \in \mathbb R^+$
Jan 5, 2014
8
Taylor series for logarithm converges towards logarithm
Feb 18, 2013
6
ETCS set theory: Are empty sets isomorphic?
Nov 14, 2013
6
When can $*$-algebras be turned into $C^*$-algebas?
Sep 23, 2015
5
On the proof of the continuity of the inner product.
May 22, 2015
5
Showing this function is continuous $ f:(x,y)\mapsto x^2+y^2$
May 11, 2015
5
What are the partial derivatives of a map $f:\mathbb{R}^n \rightarrow \mathbb{R}^m$
Dec 29, 2013
5
Suppose $a,b ∈ N$. Then $ a = \text{lcm}(a,b) \iff b|a$
Nov 13, 2014