A group is said SQ-universal whenever every countable group can be embedded into a quotient of . In some sense, SQ-universality is a “largeness property”. Motivating by this idea, we prove the two following properties: 689 more words
3 days, 4 hours
What is the common factor linking book-flips, solitaire, twelve-tone music and the solution of quartic equations? Answer: .
Symmetries of a Book — or a Brick 683 more words
2 weeks, 3 days
La siguiente lámina establece un lema vital para una demostración “más contemporánea” del Teorema de Sylow 1.
1 month, 2 weeks
The aim of this note is to prove the following theorem, due to Schur, and to exhibit some corollaries. The proof given here comes from J. 763 more words
1 month, 3 weeks