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Mathematics
Robert Furber's user avatar
Robert Furber's user avatar
Robert Furber's user avatar
Robert Furber
  • Member for 9 years, 11 months
  • Last seen more than a week ago
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19
Sequence with convergent subnets but no convergent subsequences
Jan 3, 2020
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15
Spectrum vs eigenvalues
Jul 13, 2019
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10
Can this complete metric space be a Banach space?
May 27, 2020
answer
8
A rearrangement of a conditionally convergent series is seldom convergent
May 25, 2022
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6
Are there any nontrivial examples of contradictions arising in non-foundational or applied math due to naive set theory?
May 11, 2015
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5
Prove that the Pontryagin dual of a locally compact abelian group is also a locally compact abelian group.
Oct 15, 2014
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5
Can anyone please help me to understand what does "well-defined" mean in the definition of Set?
Jun 13, 2020
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4
Is every quotient algebra of a Boolean algebra isomorphic to a subalgebra?
Sep 4, 2019
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4
Doubt about Taylor series: do successive derivatives on a point determine the whole function?
Nov 15, 2019
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3
Weak topology and strong topology in a Banach space.
Feb 3, 2016
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20
Nonequivalent definitions in Mathematics
14
A topological vector space $X$ is separable if its dual space $X^*$ is separable?
14
Is defining measures as functionals ever insufficiently general in practice?
13
Is there a measure on $[0,1]$ that is 0 on meagre sets and 1 on co-meagre sets
13
Papers that debunk common myths in the history of mathematics