5,837 reputation
22141
bio website fph.altervista.org
location Pisa, Italy
age 31
visits member for 4 years, 10 months
seen 9 hours ago

Numerical linear algebra. Mainly matrix equations and their applications (control theory, applied probability).


19h
reviewed Approve suggested edit on Interactions between (set theory, model theory) and (algebraic geometry, algebraic number theory ,…)
2d
reviewed Approve suggested edit on Gradient of the energy functional in $H^{1,2}$-norm
2d
comment graphical estimate of convergence rates [looking for textbook reference]
What do you mean exactly with "graphical methods"? A log-log plot?
Sep
19
comment How many simultaneous polynomial equations of degree 2 can software solve today?
Also, consider scicomp.stackexchange.com -- people there are much more focused on scientific computing.
Sep
19
comment How many simultaneous polynomial equations of degree 2 can software solve today?
You asked MuPAD to return all $2^{100}$ solutions -- no wonder it doesn't work. You should probably use a Newton-Raphson-type method instead, if you only want one. I haven't run anything too similar, but my guess would be that $n=100$ is doable with it, and $n=3000$ is not completely hopeless if you can find a good starting point.
Sep
19
answered The set of matrices with same spectral radius
Sep
19
reviewed Approve suggested edit on Integrability of second derivative of conformal mappings
Sep
19
comment Success Ranking Methodology
This is a modelling problem: you are basically asking to define "better". It's not a question that any amount of mathematics can answer.
Sep
18
revised Under what conditions the limit process of a sequence of Markov processes is Markov?
added 7 characters in body; edited title
Sep
17
answered Solution to generalized Sylvester equation
Sep
17
reviewed Approve suggested edit on Is there a dense subset of the real plane with all pairwise distances rational?
Sep
14
awarded  Popular Question
Sep
14
revised Another kind of the positivity of matrices
added 19 characters in body
Sep
10
comment On the solution of a generalized Lyapunov equation
@Suvrit I agree -- Both the sum-of-norms and the norm-of-sum version are mentioned in the discussion, I must have missed the stronger form when I wrote that comment.
Sep
9
revised General and generic forms in a vector space
edited body
Sep
9
comment Cases of Mathematical Fraud
Might be on topic on academia.se, but also less likely to get an answer since there are less mathematicians there.
Sep
9
comment Bounds on the effect of a matrix product on the Frobenius norm
What does "$S\succeq0$ and is fat" mean?
Sep
8
reviewed Approve suggested edit on Number of points in an intersecting linear hypergraph
Sep
6
reviewed Approve suggested edit on
Sep
6
answered reducing an n-order differential equation to a first order system of equations using either sagemath or sympy