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  * Status report talks in [[http://washington.edu/maps/?PCAR|Paccar 190]]. 3-5pm.  {{{
 
3:00 Ashwath: Heegner points
  3:20 Ari: Galois Cohomology
  3:40 Andrew: Cremona's tables (?)
  4:00 Paul: Database
  4:20 Ben: Families with torsion
  4:40 Jon: Curves with presumed torsion
  5:00 William: Status of our paper
}}}
  * Status report talks in [[http://washington.edu/maps/?PCAR|Paccar 190]]. 3-5pm.
  *
3:00 Ashwath: Heegner points
  * 3:20 Ari: Galois Cohomology
  * 3:40 Andrew: Cremona's tables (?)
  * 4:00 Paul: Database
  * 4:20 Ben: Families with torsion
  * 4:40 Jon: Curves with presumed torsion
  * 5:00 William: Status of our paper   

Twitter Feed: http://twitter.com/?q=SageMathREU#!/SageMathREU <-- Use username: SageMathREU

Week 1

Monday, June 20

Tuesday, June 21

Wednesday, June 22

Thursday, June 23

Friday, June 24

  • 10am in the Sage lab for status reports and planning.
  • Here's a table of isogenies. They were computed using just the ap values, and still include some really really big isogenies: IsogenyTable4.txt -- it corresponds to the curves in this table: matched.txt. This version does not have spaces in the isogenies column.

  • Computed some isogeny graphs for specific curves using division polynomials. Task: Find an algorithm to do the same.
  • Explicit isogeny finding worksheet: http://nt.sagenb.org/home/pub/71/

  • Here's a table of isogenies that includes the a-invariants for easy reference. IsogenyTable7.txt

  • Worksheet which uses William and Ashwath's code to check which isogeny degrees appearing in the table above are actually valid. http://nt.sagenb.org/home/pub/72/

Week 2

Monday, June 27

Tuesday, June 28

Wednesday, June 29

Thursday, June 30

  • here is an updated list of all possible valuables calculated so far, now with labels! Table

Friday, July 1

  • NOTE! ord(j) computed incorrectly if E.j_invariant = 0. Should be a quick fix to update the database. Here's a modified list for the *original* curves in matched.txt: modifiedjinv3.txt

  • Related: Here is a modified version of the table provided last Thursday: modifiedellipticcurvedatafile2.txt

Week 3

Monday, July 4

  • Here is a table listing some new curves found by twisting the ones in our original list: new_curves_via_twist.txt. Still need to check if any in the table are isomorphic or isogenous to each other. There are not too many in the list, but it was created by twisting our known curves by x + ya, where x and y only vary between -5 and 5, so there is potential for more.

Tuesday, July 5

Wednesday, July 6

Thursday, July 7

  • Here is the updated list of unknown curves still needed to be found for norm up to 1000.

Friday, July 8

Week 4 (William in Budapest this week)

Monday, July 11

Tuesday, July 12

Wednesday, July 13

Thursday, July 14

Friday, July 15

Week 5

Monday, July 18

  • Status report talks in Paccar 190. 3-5pm.

  • 3:00 Ashwath: Heegner points
  • 3:20 Ari: Galois Cohomology
  • 3:40 Andrew: Cremona's tables (?)
  • 4:00 Paul: Database
  • 4:20 Ben: Families with torsion
  • 4:40 Jon: Curves with presumed torsion
  • 5:00 William: Status of our paper
  • Notes on twisting and torsion families: TorsionFamilies.pdf

Tuesday, July 19

Wednesday, July 20

Thursday, July 21

Friday, July 22

Week 6

Monday, July 25

Tuesday, July 26

Wednesday, July 27

Thursday, July 28

Friday, July 29

  • Here is the list of unmatched curves for the norm conductor range 1k-2k: Unmatched2k.txt

Week 7

Monday, August 1

Tuesday, August 2

Wednesday, August 3

Thursday, August 4

Friday, August 5

Week 8

Monday, August 8

Tuesday, August 9

Wednesday, August 10

Thursday, August 11

Friday, August 12

reu/2011/schedule (last edited 2011-08-12 22:36:55 by psharaba)