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José Carlos Santos
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I am a mathematician who works at the University of Porto (Portugal). My PhD, on Representation Theory, was obtained at the Université Paris — Denis Diderot, in 1996.

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  • Porto, Portugal
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  • Member for 3 years, 2 months
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122 Why not include as a requirement that all functions must be continuous to be differentiable? Jun 19 '18
95 Unexpected examples of natural logarithm Jul 3 '17
84 Can a binary operation have an identity element when it is not associative and commutative? Jun 20 '17
84 How can a “proper” function have a vertical slope? Oct 5 '19
79 Does an increasing sequence of reals converge if the difference of consecutive terms approaches zero? Feb 17 '19
70 Unsolved Problems due to Lack of Computational Power Aug 16 '19
59 False proof that $ρe^{iθ} = ρ$ and so complex numbers do not exist? Dec 27 '17
57 Why a $20$ digit number starting with eleven $1$'s cannot be a perfect square? Jun 26 '17
49 What is an example of a sequence which “thins out” and is finite? Nov 13 '19
47 How many times do you have to use L'Hôpital's rule? Nov 10 '17
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