Changes between Initial Version and Version 1 of Ticket #11468
 Timestamp:
 06/15/11 17:51:55 (11 years ago)
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Ticket #11468
 Property Keywords libsingular added; elliptic curves removed

Property
Type
changed from
PLEASE CHANGE
todefect

Property
Summary
changed from
Memleak when using elliptic curves
toMemleak in multi_polynomial_libsingular.pyx

Ticket #11468 – Description
initial v1 1 1 Using the following piece of code makes the memory footprint of sage [[BR]] grow indefinitely: [[BR]] 2 2 3 sage: K = GF(1<<50,'t') [[BR]] sage: j = K.random_element() [[BR]] sage: while 1: [[BR]] ....: E = !EllipticCurve(j=j) [[BR]] ....: del E [[BR]] ....: [[BR]]3 sage: K = GF(1<<50,'t') [[BR]] sage: R.<x,y> = PolynomialRing(K) 4 4 5 This seems to be less dramatic with finite fields of char != 2 and [[BR]]inexistant for ZZ and QQ. 5 sage: a = K.random_element() [[BR]] sage: while 1: [[BR]] ....: R(a)[[BR]] ....: 6 6 7 However this makes big computations involving different elliptic curves quite inpractical.[[BR]] 7 So there is some memleak while creating elements of multivariate polynomial ring implemented with libsingular. 8 9 See http://groups.google.com/group/sagesupport/browse_thread/thread/9a8e887df34a8e9a for further discussion.