Mathematics
Salvo Tringali's user avatar
Salvo Tringali's user avatar
Salvo Tringali's user avatar
Salvo Tringali
  • Member for 11 years, 3 months
  • Last seen this week
  • Shijiazhuang, Hebei, China
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Not all those who wander are lost.

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11
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11
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4
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22
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39
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11
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22
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Top posts
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All Questions Answers
Score Newest
question
37
Correspondences between Borel algebras and topological spaces
Dec 6, 2011
answer
10
Proof skew-symmetric matrix $A$ exhibits $\vec{x}^T A \vec{x} = 0$
Dec 7, 2011
question
7
Locally Lipschitz implies Lipschitz under equivalent metrics?
Dec 21, 2011
answer
5
Is there a name for this identity involving series?
Aug 10, 2012
question
4
Powers of a densely-defined bounded linear operator
Dec 6, 2011
question
4
Neumann series in an incomplete normed algebra
Dec 10, 2011
question
2
Reference to a basic result implying existence and uniqueness of the base-$b$ representation
Jan 15, 2017
answer
2
Prove or disprove an equation about Euler's $\phi$ function
Dec 7, 2011
answer
2
Seeking a good quality reference for "lifting the exponent"
Jan 16, 2017
question
1
$eR = \mathfrak i_1 \oplus \mathfrak i_2$, with $e^2 = e$, iff $e = e_1+e_2$ for some orthogonal idempotents $e_i$
Jul 1, 2021
Top network posts
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33
How Composite can $2^n-1$ be, infinitely often?
25
Sums of sets of lower density 0
21
Is there any non-commutative ring such that every element other than the identity is a zero divisor?
18
An elementary, short proof that the group of units of the ring of integers of a number field is finitely generated
17
Sets that are not sum of subsets

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