439 questions

742

views

1

answer

1

vote

2021-07-06 21:33:42 +0100 Max Alekseyev

Find binary solution over non square matrix

• linear-algebra

differential equation

• diffequation
• graphics
• constant

How tho pass an indexed variable to a function ?

• programmation

Obtaining the Solomon-Orlik algebra in QPA with the help of Sage

• matroid

Function which works with a vector define from outside not from inside

• vector

How to transform a derived set of inequation in the good polyhedron format

• algebra

Performance of PolynomialRing evaluation

• performance
• polynomial
• ring
• evaluation

1k

views

2

answers

3

votes

2021-05-24 10:58:49 +0100 rburing

Quick (trivial) Groebner basis but too long lift of one

• groebner_basis
• equations
• PolynomialRing
• ideal
• lift

Could we have a leaf_count() function in base sagemath?

• suggestion

A certain polyhedron-related computation: any way to get it quicker?

• polyhedra
• computation_time

How to define functions with varying number of variables

• symbolic
• function
• definition
• substitution

Geometry math

Differential forms on non-standard spherical coordinates

• differential_form
• coordinates
• manifolds

How to express the coefficients of an iterated group action on a basis as a matrix?

• coefficients
• Extract_coefficients
• quotient_ring
• TypeError-Quotient

Running a for cycle in parallel

• parallelization
• for-loop
• optimization

Problem with plotting a 3d Bezier curve

• 3D-plots
• Bezier
• curve
• bug

Is there a way to define a submanifold of a Euclidean space by providing a list of implicit constraints, instead of by declaring a separate manifold and explicitly defining the embedding?

• integration
• submanifolds
• manifolds
• embedding
• surface

Is there a built-in way to integrate a vector or differential form field on an embedded submanifold of Euclidean space?

• electromagnetism
• integration
• sagemanifolds
• boundary

1k

views

2

answers

1

vote

2021-03-27 01:06:21 +0100 Juanjo

How to show that two given functions are linearly dependent

• independence
• dependence
• differential_eqns

581

views

2

answers

1

vote

2021-03-26 23:55:46 +0100 Juanjo

How to find second order differential equation from general solution?

• differential_eqns

Elementwise functions for deep learning

• elementwise
• softmax
• deep-learning
• sigmoid

Customizing sage objects latex behaviour

• latex
• Jupyter
• Configuration
• typesetting

Integer programming bi-indexed variables.

• integer
• programming

561

views

2

answers

no

votes

2021-02-23 21:58:25 +0100 Max Alekseyev

For cycles over n-uples

• for_cycles
• iteration

prove an identity for any integer

• symbolic
• symbolic-expression
• symbolic-variables
• combinatorics

vector_field.apply_map before and after vector.display (weird behaviour)

• vector_field
• apply_map
• display

Divergence of inverse square

• divergence
• dirac_delta

2k

views

1

answer

2

votes

2022-06-13 00:55:59 +0100 Max Alekseyev

Sage crash when computing variety for an ideal with many variables

• variety
• ideal
• crash

Use vector as variable for diff but as values for calculation

• vector
• symbolic-expression
• callable

integral of function with sgn (x,I) inside

• sgn