11,124 reputation
2529
bio website
location
age
visits member for 1 year, 9 months
seen 7 hours ago

University of Florence


Jul
22
answered Can a convex polygon inside a square with edge length 1 have a perimeter > 4?
Jul
22
revised Significance of starting the Fibonacci sequence with 0, 1…
typo
Jul
21
answered How find all possible lengths of AD Quadrilateral ABCD?
Jul
20
comment (Dis)continuity of function in $R^2$
You have to carefully identify what is the boundary of the set $\{(x,y) \colon x^2>2+x \wedge y<6 \}$. In this case you find that this boundary is composed by four half-lines.
Jul
20
answered Find range of values
Jul
20
answered Are there any well known mathematicians who published very little?
Jul
20
answered (Dis)continuity of function in $R^2$
Jul
20
comment (Dis)continuity of function in $R^2$
Ok, so $\wedge$ is an and not a min as I thought!... :-)
Jul
20
comment (Dis)continuity of function in $R^2$
I find it strange to write something like $A > B < C$... are you sure?
Jul
20
revised Minima point is a solution point
added 306 characters in body
Jul
20
revised Minima point is a solution point
added 5 characters in body
Jul
20
answered Minima point is a solution point
Jul
13
comment Pythagorean triple means
you mean H^2 + G^2 = A^2
Jul
12
revised Is it differentiable?
added 895 characters in body
Jul
12
comment Is it differentiable?
@user157130 that's not the definition of derivative.
Jul
12
comment Is it differentiable?
To have a chord passing through $(0,f(0))$ you need to know what is $f(0)$.
Jul
12
answered Is it differentiable?
Jul
11
comment Spherical Sampling of Projected Disk
Are you speaking of a 2-dimensional disk in 3-dimensional space?
Jul
11
answered Does the absence of horizontal lines shows that there are no $n,m\in \mathbb{N}$ such that $n^2=2m^2$?
Jul
11
answered How to calculate the length of a cubic hermite spline between two points