bio | website | |
---|---|---|
location | ||
age | ||
visits | member for | 4 years, 9 months |
seen | Jan 26 '10 at 9:45 | |
stats | profile views | 82 |
Jun 25 |
awarded | Yearling |
Aug 13 |
awarded | Good Answer |
Jan 26 |
comment |
Generic fiber of morphism between non-singular curves
You need an algebraically closed base field in the statement. Otherwise there can be points $Q\in C_1$ such that the degree $[k(Q):k(\phi (Q))]>1$ in which case the number of points in the fibre $\phi^{-1}(\phi (Q))$ is less than the degree. |
Jan 20 |
answered | Representability of finite metric spaces |
Jan 19 |
answered | What are examples illustrating the usefulness of Krull (i.e., rank > 1) valuations? |
Jan 19 |
answered | What are examples illustrating the usefulness of Krull (i.e., rank > 1) valuations? |
Dec 9 |
answered | What does “linearly disjoint” mean for abstract field extensions? |
Dec 2 |
answered | Is (relatively) algebraically closed stable under finite field extensions? |
Nov 26 |
answered | Weil divisors on non Noetherian schemes |
Nov 19 |
awarded | Nice Answer |
Nov 18 |
awarded | Teacher |
Nov 18 |
answered | What's so great about blackboards? |