24,965 reputation
35592
bio website sites.google.com/site/…
location Italy
age
visits member for 4 years, 2 months
seen 21 mins ago

Mathematician, researching in Algebraic Geometry and related topics.


Sep
19
comment Endomorphism Ring of Simple Abelian Varieties
The answer to your question is yes, except few exceptions that are classified. See Birkenhake-Lange, Complex Abelian Varieties, Theorem 9.9.1.
Sep
18
comment Contracting a rational curve in a Calabi-Yau threeolfd
I do not have Reid's paper on my desk now, but are you sure that this is not a local statement (like Laufer's one contained in my answer)? The OP asks whether there are examples of such a contraction in a Calabi-Yau threefold: this is a question of global nature, and I do not see a obvious way to answer it by means of a local result.
Sep
18
answered Contracting a rational curve in a Calabi-Yau threeolfd
Sep
15
revised Besides the tracioid are there other surfaces of revolution that have a constant negative curvature?
added 497 characters in body
Sep
15
revised Besides the tracioid are there other surfaces of revolution that have a constant negative curvature?
added 216 characters in body
Sep
15
answered Besides the tracioid are there other surfaces of revolution that have a constant negative curvature?
Sep
14
awarded  Enlightened
Sep
14
awarded  Nice Answer
Sep
14
revised Union of conjugates in free groups
edited tags
Sep
14
revised Union of conjugates in free groups
added 8 characters in body
Sep
13
revised Union of conjugates in free groups
added 1 character in body
Sep
13
revised Union of conjugates in free groups
added 2 characters in body
Sep
13
answered Union of conjugates in free groups
Sep
5
comment What Should be there in a Single Variable Calculus course for Engineers?
I definitely sympathize with you. However, I think that a better place for this question is matheducators.stackexchange.com
Sep
4
revised Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
added 6 characters in body
Sep
4
revised Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
deleted 2 characters in body
Sep
4
comment Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
In fact, the answer to the question is yes. I give another construction in my answer below. If I read correctly Broughton's table, $n=6$ is actually the only possibility, so basically there is only one example.
Sep
4
revised Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
added 1089 characters in body
Sep
4
revised Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
deleted 482 characters in body
Sep
4
comment Existence of orientation preserving, finite order self homeomorphism on a genus 2 surface without fixed point
@abx: ok, you are right.