Graphs, visual representations outlining the relationships between different entities, concepts or variables, can be very ...

B. Bollobás and O. Riordan, A polynomial invariant of graphs on surfaces, Math. Ann. 323 (2002) 81–96. Web of Science, Google Scholar 3. S. Chmutov, Generalized duality for graphs on surfaces and the ...

Covers all Number Theory areas: elementary & analytic number theory, algebraic number theory, arithmetic algebraic geometry, diophantine eqs & approximation, modular forms, etc ...