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2024-12-28 17:00:04 +0200 received badge  Notable Question (source)
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2024-09-22 14:55:11 +0200 commented answer How to obtain a linear space from the direct sum of two spaces?

Hi, this means that there exists no feasible way to the problem on Sage? There exists no feasible way to the problem on

2024-09-22 14:53:49 +0200 commented answer How to obtain a linear space from the direct sum of two spaces?

Hi, this means that there exists no feasible way to the problem on Sage?

2024-09-19 18:27:18 +0200 commented answer How to obtain a linear space from the direct sum of two spaces?

Thank you very much! Even using the condition while W2.intersection(W1).dimension() != 0:, I also do not get a successfu

2024-09-19 18:21:05 +0200 received badge  Commentator
2024-09-19 18:21:05 +0200 commented answer How to obtain a linear space from the direct sum of two spaces?

Thank you very much! Even using the condition while W2.intersection(W1).dimension() != 0:, I also do not get a successfu

2024-09-19 16:48:26 +0200 commented answer How to obtain a linear space from the direct sum of two spaces?

Thanks! But I seem not to get a successful test! def random_small_space_gen(t,m): B = matrix(GF(q),t,m,0) whil

2024-09-19 11:38:34 +0200 marked best answer How to fast generate a matrix with columns of fixed hamming weight

Dear all,

How to generate a matrix whose columns have fixed hamming weight in the finite field GF(2) ?

I hope for a fast method for a huge matrix, for example, rows 150000, columns 4000, weight 250.

Thanks all!

2024-09-19 10:59:51 +0200 asked a question How to obtain a linear space from the direct sum of two spaces?

How to obtain a linear space from the direct sum of two spaces? Dear all, Given a linear space $V$ of dimension $m$ ove

2024-09-19 10:00:18 +0200 marked best answer How to define q-polynomial in a finite field GF(q^m)?

Dear all,

A $q$-polynomial of $q$-degree $r$ in $GF(q^m)$ is a polynomial of the form $P(x) = \sum_{i=0}^{r}p_ix^{q^i}$ for $p_i \in GF(q^m)$, $p_r\neq 0$.

How to define this $q$-polynomial in $GF(q^m)$? I do not find this and its operations in Reference Manual.

2024-09-19 09:58:21 +0200 received badge  Popular Question (source)
2024-04-29 17:26:20 +0200 commented answer How to fast generate a matrix with columns of fixed hamming weight

Thanks! This is a clever method. But it takes about 40 seconds for NROWS, NCOLS, WEIGHT = 150000, 4000, 250. I found a

2024-04-29 17:25:22 +0200 commented answer How to fast generate a matrix with columns of fixed hamming weight

Thanks! This is a clever method. But it takes about 40 seconds for NROWS, NCOLS, WEIGHT = 150000, 4000, 250. I found a

2024-04-29 17:24:43 +0200 commented answer How to fast generate a matrix with columns of fixed hamming weight

Thanks! This is a clever method. But it takes about 40 seconds for NROWS, NCOLS, WEIGHT = 150000, 4000, 250. I found a

2024-04-29 17:08:12 +0200 commented question How to fast generate a matrix with columns of fixed hamming weight

Thanks!It is better if such a matrix is random. I have found a method that costs about 3s.

2024-04-29 06:41:17 +0200 commented question How to fast generate a matrix with columns of fixed hamming weight

No random matrix! A matrix of size 150000 \times 4000, whose each column has a fixed hamming weight of 250. If using t

2024-04-29 04:49:10 +0200 edited question How to fast generate a matrix with columns of fixed hamming weight

How to fast generate a matrix with columns of fixed hamming weight Dear all, How to generate a matrix whose columns hav

2024-04-29 04:47:42 +0200 asked a question How to fast generate a matrix with columns of fixed hamming weight

How to fast generate a matrix with columns of fixed hamming weight Dear all, How to generate a matrix whose columns hav

2024-03-09 16:32:18 +0200 marked best answer How to generate random vector with specific hamming weight in GF(q) ?

Dear all,

How to generate random vectors with a specific hamming weight in the finite field GF(q) ?

Thanks!

2024-03-09 11:25:43 +0200 asked a question How to generate random vector with specific hamming weight in GF(q) ?

How to generate random vector with specific hamming weight in GF(q) ? Dear all, How to generate random vectors with a s

2024-01-03 14:56:28 +0200 received badge  Notable Question (source)
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2023-02-12 14:44:24 +0200 edited question q-polynomial and Rank Decoding Problem

q-polynomial and Rank Decoding Problem Dear all, For the Rank Decoding (RD) problem: Given $y=mG+e$ , random row full-

2023-02-10 02:28:57 +0200 commented question How to define q-polynomial in a finite field GF(q^m)?

I have other questions. Look at https://ask.sagemath.org/question/66323/q-polynomial-and-rank-decoding-problem/

2023-02-10 02:28:03 +0200 asked a question q-polynomial and Rank Decoding Problem

q-polynomial and Rank Decoding Problem Dear all, For the Rank Decoding (RD) problem: Given $y=mG+e$ , random row full-

2023-02-10 01:54:02 +0200 commented question How to define q-polynomial in a finite field GF(q^m)?

I have other questions.

2023-02-10 01:52:04 +0200 commented question How to define q-polynomial in a finite field GF(q^m)?

For the RD problem, since all coordinates of $\bm e=(e_1,e_2,...,e_n)$ of weight $r$ lie in the same support (a subspace

2023-02-09 12:23:08 +0200 commented question How to define q-polynomial in a finite field GF(q^m)?

Thanks very much!!!

2023-02-09 12:19:59 +0200 edited question How to define q-polynomial in a finite field GF(q^m)?

How to define q-polynomial in a finite field GF(q^m)? Dear all, A $q$-polynomial of $q$-degree $r$ in $GF(q^m)$ is a po

2023-02-09 04:04:21 +0200 edited question How to define q-polynomial in a finite field GF(q^m)?

How to define q-polynomial in a finite field GF(q^m)? Dear all, A $q$-polynomial of $q$-degree $r$ in $GF(q^m)$ is a po

2023-02-09 03:57:34 +0200 edited question How to define q-polynomial in a finite field GF(q^m)?

How to define q-polynomial in a finite field GF(q^m)? Dear all, A $q$-polynomial of $q$-degree $r$ in $GF(q^m)$ is a po

2023-02-09 03:57:01 +0200 edited question How to define q-polynomial in a finite field GF(q^m)?

How to define q-polynomial in a finite field GF(q^m)? Dear all, A $q$-polynomial of $q$-degree r in $GF(q^m)$ is a poly

2023-02-09 03:55:29 +0200 asked a question How to define q-polynomial in a finite field GF(q^m)?

How to define q-polynomial in a finite field GF(q^m)? Dear all, A $q$-polynomial of $q$-degree r in $GF(q^m)$ is a poly

2022-12-03 16:26:36 +0200 received badge  Popular Question (source)
2022-02-26 09:44:50 +0200 commented answer Generating an invertible matrix over a finite field

Yes! thanks!

2022-02-26 09:44:46 +0200 marked best answer Generating an invertible matrix over a finite field

How to generate an invertible matrix over a finite field?

2022-01-20 09:06:36 +0200 received badge  Student (source)
2022-01-20 04:04:59 +0200 edited question Generating an invertible matrix over a finite field

Generating an invertible matrix over a finite field? How to generate an invertible matrix over a finite field?

2022-01-20 04:02:53 +0200 asked a question Generating an invertible matrix over a finite field

Generating an invertible matrix over a finite field? How to generate an invertible matrix over a finite field?

2021-05-09 04:37:00 +0200 commented question How to make the product of two linear spaces?

No cartesian_product. I only know this method with poor efficiency. Do you have other efficient methods? q = 2 ; m = 22

2021-05-09 04:28:08 +0200 commented question How to delete several vectors from a vector space?

q = 2 ; m = 229; n = 83; r = 8 Fqm = GF(q^m) def gen_vec_space(t): # generate a vector space of dimension t over Fq

2021-05-09 04:27:56 +0200 commented question How to delete several vectors from a vector space?

q = 2 ; m = 229; n = 83; r = 8 Fqm = GF(q^m) def gen_vec_space(t): # generate a vector space of dimension t over Fq

2021-05-09 04:25:04 +0200 commented question How to delete several vectors from a vector space?

q = 2 ; m = 229; n = 83; r = 8 Fqm = GF(q^m) def gen_vec_space(t): # generate a vector space of dimension t over Fq

2021-05-09 04:24:30 +0200 commented question How to delete several vectors from a vector space?

q = 2 ; m = 229; n = 83; r = 8 Fqm = GF(q^m) def gen_vec_space(t): # generate a vector space of dimension t over Fq