437 questions

Gradient (nabla)

423

views

1

answer

1

vote

3 years ago 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

827

views

2

answers

3

votes

3 years ago 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

Geometry math

How to define functions with varying number of variables

• symbolic
• function
• definition
• substitution

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

Why `unable to convert (sin(h(x)), cos(h(x))) to a symbolic expression`?

• symbolic-expression

Problem with plotting a 3d Bezier curve

• 3D-plots
• Bezier
• curve
• bug

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

4 years ago Juanjo

How to show that two given functions are linearly dependent

• independence
• dependence
• differential_eqns

397

views

2

answers

1

vote

4 years ago 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

389

views

2

answers

no

votes

4 years ago Max Alekseyev

For cycles over n-uples

• for_cycles
• iteration

Systematically outputting sign vectors of restricted hyperplane arrangement

• Hyperplane
• subspace

prove an identity for any integer

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

Divergence of inverse square

• divergence
• dirac_delta

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

• vector_field
• apply_map
• display

Use vector as variable for diff but as values for calculation

• vector
• symbolic-expression
• callable