Una volta si parlava di matematica ‘pura’ (da contrapporsi ad ‘applicata’). Oggi che si può facilmente riconoscere come ci sia…
Eventi
Asymptotic Combinatorics, Stability and Ultrafilters – EVENTO ANNULLATO – Amador Martin-Pizzarro (Albert-Ludwigs-Universität Freiburg)
A finite subset A of a group G is said to have doubling K if the set A\cdot A consisting of products a\cdot b, with a and b in A has size at most KA. Extreme examples of sets with small doubling are cosets of subgroups. Theorems of Freiman-Ruzsa…