Elliptic curve L-series bug

[williamstein]

There is a bug in computing the values along a line of the L-series:

sage: E = EllipticCurve('389a')
sage: E.Lseries().values_along_line(0.5, 3, 5)

This is just a light wrapper around Rubinstein's lcalc, so should be easy to fix.

Component: number theory

Issue created by migration from https://trac.sagemath.org/ticket/762

[sagetrac-mabshoff]

comment:1

With 2.8.10.alpha1 we are getting a different error:

----------------------------------------------------------------------
| SAGE Version 2.8.10.alpha1, Release Date: 2007-10-27               |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------

sage: sage: E = EllipticCurve('389a')
sage: sage: L = E.Lseries_dokchitser()
---------------------------------------------------------------------------
<type 'exceptions.AttributeError'>        Traceback (most recent call last)

/tmp/Work-mabshoff/sage-2.8.10.alpha1/<ipython console> in <module>()

<type 'exceptions.AttributeError'>: 'EllipticCurve_rational_field' object has no attribute 'Lseries_dokchitser'
sage: sage: E.Lseries_values_along_line(0.5, 3, 5)

Cheers,

Michael

[williamstein]

Description changed:

--- 
+++ 
@@ -2,11 +2,7 @@
 
 ```
 sage: E = EllipticCurve('389a')
-sage: L = E.Lseries_dokchitser()
-sage: E.Lseries_values_along_line(0.5, 3, 5)
-Traceback (most recent call last):
-...
-ValueError: too many values to unpack
+sage: E.Lseries().values_along_line(0.5, 3, 5)
 ```
 
-This is just a light wrapper around Rubinstein's lcalc, so should be very easy to fix. 
+This is just a light wrapper around Rubinstein's lcalc, so should be easy to fix. 

[williamstein]

this fixes the bug.

[williamstein]

comment:3

Attachment: trac762.patch.gz

[sagetrac-mabshoff]

comment:5

applied to 2.8.11.alpha0