eric_g's profile - overview

● Nice Answer   × 164

• Is there a way to define local symbolic variables inside functions that do not overwrite global ones?
• import tetrahedron error
• In-line graphics for Sage in ipython notebook?
• Can we symbolically derive geodesic equation for a given metric using its Christoffel symbols?
• Unable to locate package Sagemath
• How to calculate rotation and spin coefficients of tetrads in SageMath?
• How to define a generic function of two variable t and r
• name 'Graph' is not defined
• Confused about covariant derivatives and tensors in SageMath
• Computing the Chern–Pontryagin invariant
• Real and imaginary part of an expression with assumptions on variables
• Covariant derivative
• How can I check for the new functions in sage 10.1?
• Cannot start jupyterlab notebook
• Why does sage fail to detect the symmetry here?
• @Parallel - how to use all CPUs
• What functionality from SymPy is incorporated in Sage
• R_{ab} = T_{ba} and so on
• tick formatter pi cause the plot of squared sine function to have long tick label
• Sage doesn't support completely modern string formatting
• LCM of 3 polynomials
• Sagemath installation with apt package manager installs outdated version
• SageMath installation failed in Ubuntu 20.04
• controling ticks using graphics_array using sage 8.4 (ubuntu 18.04)
• Redefine symbolic function even in derivatives
• Can declare symbolic variable with specific type?
• Computing gradients of vector fields?
• Using dz /\ dx convention in SageManifolds
• show command latex
• Add legend to implicit_plot for different parameter values
• 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?
• Contraction of Levi-Civita Symbols
• Restriction of domain of vector field
• Several charts at top create trouble with submanifolds
• Working with tetrads and the spin connection
• Integrating differential forms
• Differential forms on non-standard spherical coordinates
• Set LaTeX fontsize in labels?
• Sage fails to evaluate this expression.
• Dot-angle syntax
• Is there some import I need to do for defining variables?
• Size of Labels on a Plot
• What to do for using the IPython notebook?
• falling_factorial produces AttributeError
• Summation in a range
• Using interact
• Can I alias a sage command?
• derivative of order var('m') returns 0
• how to produce graphics from cli
• Error in rising_factorial
• Symbolic vector field
• Axes labels on 3D plots?
• Derivation of a sagemanifold vector (possible bug)
• Sage manifold error
• Using differential forms---within SageManifolds
• Coordinate Transforms
• How to include PDF image from Sage into LaTeX document (scale issue)?
• What's this result of equation solving?
• Parametric plot with piecewise input
• Make ipython notebook world-viewable?
• Why use symbolic functions?
• how to simplify differential form
• help on using chain rule in Sage
• Trigonometric equality (with arctan and arcsin)
• [RESOLVED]Use sage objects in python module files
• Is it possible to define (or assume) the derivative of a function
• Computing Riemann connection fails in Maxima
• Better implementation for Laplace-Beltrami operator
• integrate x^3/(exp(x)-1) between 0 and infinity
• ode and piecewise function
• How does sagemath modify python?
• Should I / how should I make an optional sage package?
• jupyter interface vs. sagenb
• Infinite initial conditions in ODE and arbitrary constant
• Sage pip not compatible with PyPI
• make doc-pdf fails (sage 8.0/ubuntu 16.04)
• Project defined functions
• Name of this project: Sage or Sagemath?
• No tick marks
• Render Latex in IPython notebook and display on output line
• Good(new 2017+) Book/Tutorial
• Potential from an exact differential form
• how to define the codomain of a symbolic function
• Numerical Integral with variable params
• div, grad and curl once again
• Create multivariate function of a list of variables
• tab completion observation
• How to calculate Work from Potential
• best way to convert many notebooks from sagenb to jupyter?
• 3D Vector Field Doesn't have Arrows
• viewer 3D problem
• Can this fraction be simplified ?
• Alternating symbols with SageManifolds
• Curl in 2D Manifolds
• Sum using coefficients of a expansion
• About SymmetricGroupRepresentation()
• how to run maxima code in Sage?
• make ptest fails after compilation based on Python3
• Another problem simplifying symbolic trigonometric expressions
• R-module/algebra valued differential forms
• what instance is integral from?
• Typing in a command of an adding-to-infinity sum
• Quaternions Missing Important Functionality?
• Running Sagemath 8.2 natively in Windows, how to change the Jupyter default directory?
• Python 3 print in Sage
• show(LatexExpr(" \frac{x}{\cos(x)}")) need 2 \\
• How to edit pixel values of color image in SageMath?
• How to convert an integer to fixed length binary string in Sage?
• Cannot get threejs rendering to work on MacOS
• How to realize the composition of rational function mappings with Sagemath?
• integration - StopIntegration support?
• SageManifolds different frames
• .canonicalize_radical() produces incorrect result
• Sagemanifold - Connection components from a tensor (not a metric)
• Redefine Method in Sage class
• jupyter tutorial
• Wrong factorization of expressions containing exponentials ?
• Solved: Why does integrate(psi(y)*f(y),y) return an error but integrate(psi(t,y)*f(t,y),y) works?
• Coefficients of partial derivatives
• grad() at glacial speed
• Is SageManifolds adequate to work with homogeneous Riemannian manifolds?
• Differential forms best package
• Arrow length goes wild near poles in vector field plot
• Bipolar coordinate system
• tangent space vector mapping
• set_default_chart seems to fail
• How to create/use matrices valued in differential forms?
• How to grab the 'function' part of a differential form?
• Trouble with spherical coordinates in sagemanifolds
• How to define multiple objects with a for loop?
• Opening "old" Sage Notebooks in Jupyter: not UTF-8 encoded
• SageManifolds: Equations of motion for scalar field
• Source for Principal Null Directions Kerr, Example Worksheet
• Setting the components of a differential form systematically.
• Changing chart multiple times in sagemanifolds
• Error computing curvature of graph submanifold
• Interactive linear programming
• Check if a curve is a geodesic
• Display connection coefficients under a change of chart
• How to transform fxy.solve(y) into function I can plot?
• How can I get the Sage version 9 on ubuntu?
• Working with units
• gen_lengendre_p bug
• Getting LaTeX code from Sage when running %display latex
• PEMDAS unexpected result
• Index notation
• metric perturbations on Sagemanifolds
• abstract index notation and differential geometry
• Installing packages using pip for Sage installed via apt
• simplify_full() does not simplify
• Substituting variable/function
• Sagemanifolds display has deteriorated
• When affine_connection is empty
• Tangent vector field
• Latex (?)--Riemann tensor overflow
• Pullback computation hanging
• Coordinate for legend_label
• metric to christoffel symbols yielding overflow
• how to join functions with an intermediate fit to obtain smooth derivatives
• Extrinsic curvature of Riemannian submanifold: no basis found for computing the components
• Substitute a function in a formal derivative
• Quickly recalling the definition of a temporary function to make minor edits?
• Formula manipulation
• Can Sage verify (some) hyperbolic identities?

● Good Answer   × 52

• Is there a way to define local symbolic variables inside functions that do not overwrite global ones?
• How to calculate rotation and spin coefficients of tetrads in SageMath?
• Real and imaginary part of an expression with assumptions on variables
• How can I check for the new functions in sage 10.1?
• Cannot start jupyterlab notebook
• Getting LaTeX code from Sage when running %display latex
• Size of Labels on a Plot
• Redefine symbolic function even in derivatives
• SageMath installation failed in Ubuntu 20.04
• Can declare symbolic variable with specific type?
• Integrating differential forms
• gen_lengendre_p bug
• how to define the codomain of a symbolic function
• What to do for using the IPython notebook?
• Summation in a range
• Axes labels on 3D plots?
• Using interact
• Parametric plot with piecewise input
• help on using chain rule in Sage
• Trigonometric equality (with arctan and arcsin)
• how to produce graphics from cli
• Should I / how should I make an optional sage package?
• Good(new 2017+) Book/Tutorial
• div, grad and curl once again
• Create multivariate function of a list of variables
• 3D Vector Field Doesn't have Arrows
• Can this fraction be simplified ?
• Sum using coefficients of a expansion
• Potential from an exact differential form
• make ptest fails after compilation based on Python3
• Curl in 2D Manifolds
• Typing in a command of an adding-to-infinity sum
• .canonicalize_radical() produces incorrect result
• show(LatexExpr(" \frac{x}{\cos(x)}")) need 2 \\
• Is it possible to define (or assume) the derivative of a function
• Can I alias a sage command?
• Coefficients of partial derivatives
• Better implementation for Laplace-Beltrami operator
• Arrow length goes wild near poles in vector field plot
• Bipolar coordinate system
• Alternating symbols with SageManifolds
• How to create/use matrices valued in differential forms?
• How to grab the 'function' part of a differential form?
• How to define multiple objects with a for loop?
• Trouble with spherical coordinates in sagemanifolds
• Source for Principal Null Directions Kerr, Example Worksheet
• simplify_full() does not simplify
• Render Latex in IPython notebook and display on output line
• When affine_connection is empty
• Extrinsic curvature of Riemannian submanifold: no basis found for computing the components
• falling_factorial produces AttributeError
• Formula manipulation

● Guru   × 5

• Is there a way to define local symbolic variables inside functions that do not overwrite global ones?
• Good(new 2017+) Book/Tutorial
• div, grad and curl once again
• .canonicalize_radical() produces incorrect result
• How to create/use matrices valued in differential forms?

● Great Answer   × 7

• Is there a way to define local symbolic variables inside functions that do not overwrite global ones?
• Good(new 2017+) Book/Tutorial
• div, grad and curl once again
• 3D Vector Field Doesn't have Arrows
• .canonicalize_radical() produces incorrect result
• Coefficients of partial derivatives
• How to create/use matrices valued in differential forms?

● Autobiographer   × 1

● Critic   × 1

• use while loop to check a number is prime or not

● Associate Editor   × 1

• Covariant Derivative gives Error, why? (SAGE 7.5.1)

● Civic Duty   × 1

• complex exponential/trigonometric

● Organizer   × 1

• worksheets inaccessible in 7.3 after attempt to upgrade to Jupytern

● Enthusiast   × 1

● Commentator   × 1

• can sage be made to do this algebra?

● Enlightened   × 1

• What to do for using the IPython notebook?

● Editor   × 1

• Sage fails to evaluate this expression.

● Supporter   × 1

• 3D grid like the one in the picture

● Teacher   × 1

• Set LaTeX fontsize in labels?

● Necromancer   × 7

• Why `unable to convert (sin(h(x)), cos(h(x))) to a symbolic expression`?
• Size of Labels on a Plot
• Coordinate Transforms
• Make ipython notebook world-viewable?
• In-line graphics for Sage in ipython notebook?
• How could I notice that a SAGE program is running?
• Quaternions Missing Important Functionality?

● Taxonomist   × 1