To download latest stable release use https://mirrors.mit.edu/sage/src/index.html.
To download development releases use https://www.sagemath.org/download-latest.html
To build do
unset SAGE_ROOT unset SAGE_LOCAL #Do this to force sage to use system's before building sage export GIAC=/usr/local/bin/giac export MAXIMA=/usr/bin/giac #Now do (to build with newer python), make sure to tell it to #use system giac, which I installed before, since it is newer #version. see my giac notes on how to install giac ./configure --with-system-python3=no --with-system-giac=force make make install
To obtain version numbers of installed CAS systems do (see also https://ask.sagemath.org/question/42617/how-to-find-version-number-of-cas-used-by-sage/
>sage SageMath version 9.8, Release Date: 2023-02-11 Using Python 3.11.1. Type "help()" for help. #ignore this, since I install maxima manually outside sage age: ver = installed_packages() sage: ver['maxima'] #WRONG. version. I have deleted maxima used by sage '5.45.0.p0' #use this below, since I installed maxima outside sage. #but make sure to remove the maxima's binaries installed by sage from its local/bin #after installing external maxima and do the following # >cd $SAGE_ROOT/local/bin # >rm rmaxima # >rm maxima # >rm xmaxima # >ln -s /usr/bin/rmaxima # >ln -s /usr/bin/maxima # >ln -s /usr/bin/xmaxima #now do this to get the correct version of the external maxima used sage: print(maxima.version()) 5.46.0 #to install fricas, use the command # > sage -i fricas #AFTER installing sagemath sage: print(fricas.eval(")lisp |$build_version|")) Value = "FriCAS 1.3.8" #this will now print the version by external giac since we asked #sage to use system giac before sage: print(giac.version()) "giac 1.9.0, (c) B. Parisse and R. De Graeve, Institut Fourier, Universite de Grenoble I" age: gap.version() '4.11.1' sage: pari.version() (2, 15, 2) sage: gp.version() ((2, 15, 2), 'GP/PARI CALCULATOR Version 2.15.2 (released)')
To enter an ode do
age: x = var('x') sage: y = function('y') sage: ode=diff(y(x),x)+y(x)==sin(x) sage: ode y(x) + diff(y(x), x) == sin(x)
To obtain lhs and rhs of equation
age: ode.lhs() y(x) + diff(y(x), x) sage: ode.rhs() sin(x)
To use sagemath to solve ODE
x = var('x') y = function('y') sage: desolve(diff(y(x),x,2) + y(x) ==0, y(x),algorithm='fricas') _C0*cos(x) + _C1*sin(x) sage: desolve(diff(y(x),x,2) + y(x) ==0, y(x),algorithm='maxima') _K2*cos(x) + _K1*sin(x)
To check if integral evaluated or not, do
var('x') sage: anti=integrate(sqrt(1+x^3),x) sage: anti integrate(sqrt(x^3 + 1), x) sage: isinstance(anti.operator(), sage.symbolic.integration.integral.IndefiniteIntegral) True
To simplify, use expr.full_simplify()
to find what methods are there for some expressions to appy to, type expr.<TAB> i.e. hit
TAB key after the dot.
see help on http://doc.sagemath.org/html/en/genindex.html
see http://doc.sagemath.org/html/en/tutorial/programming.html