Raffaele

56 reputation

bio	website
	location	Turin, Italy
	age	54
visits	member for	6 months
	seen	May 15 at 14:03
stats	profile views	6

I am graduated in mathematics here in Torino, Italy, where I live since 1971. My dissertation was about Semigroups of Linear Operators in Banach Spaces.

My origin is Napoli, South Italy, where I lived until I was 13. Since I got my degree in 1982, I work as a math teacher in State schools called "Liceo Scientifico". My students' age ranges from 14 to 18.

	56 reputation	bio	website		visits	member for	6 months
2 badges		location	Turin, Italy		seen	May 15 at 14:03

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3 Questions

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5	The infinite product of the sines of all positive integers is zero
3	Does a quasiperfect number exist? (n = sum of its divisors $\ne$ n,1)
3	Closure of the set $\{\sin(n): n\in\mathbb{N}, n > 0\}$ is the interval of reals $[-1,1]$? [duplicate]

56 Reputation

+25	The infinite product of the sines of all positive integers is zero
+15	Does a quasiperfect number exist? (n = sum of its divisors $\ne$ n,1)
+15	Closure of the set $\{\sin(n): n\in\mathbb{N}, n > 0\}$ is the interval of reals $[-1,1]$?