^^Roberto Occa girovagare matematico.
Links
Video
 Circolo trigonometrico
 Notazione potenze col triangolo
 All possible pythagorean triples, visualized
 Algebraic Calculus One  Coming soon!
njwildberger
 corsi
https://www.openlearning.com/courses/archimedesthelawofthelever
http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/newparadigminmicroscopyatomicforcemicroscopeonachip
12set2017 wp/Hyperreal_number
26ago2017
wp/Twelvefold_way

GianCarlo_Rota 
Rota's_conjecture 

https://phys.org/news/201308rotaconjectureyearoldmathproblem.html#jCp
 librosito: Geometria quadratica.
Trigonometria quadratica.
24ago2017
 Partendo da Vladimir Arnold
citato da AndreaFarusi
 Fourvertex_theorem(or more
vertex): plane oval has at least four curvature extrema
 Evolute of a curve
 the
locus of all its centers of curvature
 equi: the envelope of the normals to a curve.
es: The evolute of a circle is therefore a single point at its center.
 Jordan_curve_theorem
 wp/Poliedro_monostabile
Numeri primi: quanti sono ? come sono distribuiti ?
Legendre's_conjecture: prime in [n^{2} , (n + 1)^{2}] ? almost 1
i.e. there
is a prime number between n^{2} and (n + 1)^{2} for every
positive integer n.
As of 2017, the conjecture has neither been proved nor
disproved.
oeis.org/A014085 Number of
primes between n^2 and (n+1)^2. (Online Encyclopedia of Integer Sequences)
Sum of integer powers
1+2+3+... 1^{2}+2^{2}+3^{2}+... 1^{3}+2^{3}+3^{3}+...
1^{4}+2^{4}+3^{4}+...
The Bernoulli numbers are rooted in the early history of the computation of
sums of integer powers, which have been of interest to mathematicians since
antiquity wp/Bernoulli_number