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University of Florence


Dec
13
comment Hypothetical contradiction to Bolzano-Weierstrass
This works with every number, it is not required that the number is irrational. The digits can be 0... so some digit will repeat infinitely many times.
Dec
10
accepted moebius transforms preserve sum of signed curvatures
Dec
9
answered how many distinct real zeros a function has
Dec
6
revised Show all roots of $\sum_{k=0}^n 2^{k(n-k)} x^k$ are real (December 6, 2014 Putnam problem)
deleted 8 characters in body
Dec
1
comment find the slope and intercepts of the line
The same method applies to b). You need to solve for $y$.
Dec
1
comment How to simplify / combine function equtions containing `if`?
There is not a unique way to simplify a function. For most purpouses the expression you have is the best way to express the function. Why you need a simplification? What's your goal?
Nov
30
answered Finding $\lim_{x\rightarrow 1}\sqrt{x-\sqrt{x-\sqrt{x-\sqrt{x…}}}}$
Nov
30
comment Continuity of addition map with lower limit topology
i've corrected it...
Nov
30
revised Continuity of addition map with lower limit topology
corrected
Nov
30
revised The infinite sum of the reciprocal of a strictly increasing sequence is irrational if we place a limiting condition on the se quence itself
added 377 characters in body
Nov
30
answered The infinite sum of the reciprocal of a strictly increasing sequence is irrational if we place a limiting condition on the se quence itself
Nov
28
revised set notation, find min
added 557 characters in body
Nov
28
answered set notation, find min
Nov
28
accepted compute exponential of matrix with wolfram alpha
Nov
27
comment compute exponential of matrix with wolfram alpha
Now I got it... MatrixExp is the right function to use.
Nov
27
asked compute exponential of matrix with wolfram alpha
Nov
27
answered If $\dfrac{x_{n+1}}{x_n}$ converges to $l$, then $x_n$ converges to $0$
Nov
27
answered Metric space problem.
Nov
27
answered How to show that $\lim_{x\to \infty}f'(x)=0$
Nov
27
answered Continuity of addition map with lower limit topology