Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Remove redundant modulo operation in vector_modn_dense #38835

Open
wants to merge 3 commits into
base: develop
Choose a base branch
from
Open

Remove redundant modulo operation in vector_modn_dense #38835

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
69e7af6
Remove redundant modulo operation in vector_modn_dense
user202729 Oct 22, 2024
6819635
Minor change
user202729 Oct 27, 2024
c97a639
Apply suggestions from code review
user202729 Nov 1, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
23 changes: 19 additions & 4 deletions src/sage/modules/vector_modn_dense.pyx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -168,19 +168,34 @@ cdef class Vector_modn_dense(free_module_element.FreeModuleElement):
self._init(parent.degree(), parent, parent.base_ring().order())

def __init__(self, parent, x, coerce=True, copy=True):
"""
Create an element.

TESTS:

Note that ``coerce=False`` is dangerous::
user202729 marked this conversation as resolved.
Show resolved Hide resolved

sage: V = VectorSpace(GF(7), 3)
sage: v = V([2, 9, -5], coerce=False)
sage: v[0] == v[1]
False
sage: v[0] + 1 == v[1] + 1
True
sage: v[0] == v[2]
False
"""
cdef Py_ssize_t i
cdef mod_int a, p
if isinstance(x, xrange):
cdef mod_int a
if isinstance(x, range):
x = tuple(x)
if isinstance(x, (list, tuple)):
if len(x) != self._degree:
raise TypeError("x must be a list of the right length")
if coerce:
R = parent.base_ring()
p = R.order()
for i from 0 <= i < self._degree:
a = int(R(x[i]))
self._entries[i] = a % p
self._entries[i] = a
else:
for i from 0 <= i < self._degree:
self._entries[i] = x[i]
Expand Down
Loading