Si l'interface giac est perdue, (cela peut arriver par exemple apresune interruption si giac a quitte) On peut faire quitter l'interface pour qu'elle redemarre proprement a la prochaine utilisation de giac.
(On perd alors ce qui a ete defini dans et avec giac avant).
3 2 b Traceback (click to the left of this block for traceback) ... ValueError: The giac session in which this object was defined is no longer running. 3
2
b
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_8.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n" + _support_.preparse_worksheet_cell(base64.b64decode("Yz1naWFjKDMpO2M7Z2lhYy5zZXQoJ2InLDIpO2dpYWMoJ2InKTtnaWFjLnF1aXQoKTtnaWFjKCdiJyk7YztnaWFjKDExKTs="),globals())+"\\n"); execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpzw3spP/___code___.py", line 3, in <module>
exec compile(u"c=giac(_sage_const_3 );c;giac.set('b',_sage_const_2 );giac('b');giac.quit();giac('b');c;giac(_sage_const_11 );" + '\n', '', 'single')
File "", line 1, in <module>
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/displayhook.py", line 174, in displayhook
print_obj(sys.stdout, obj)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/displayhook.py", line 142, in print_obj
print >>out_stream, `obj`
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/giac.py", line 976, in __repr__
self._check_valid()
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/expect.py", line 1136, in _check_valid
raise ValueError, "The %s session in which this object was defined is no longer running."%P.name()
ValueError: The giac session in which this object was defined is no longer running.
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On peut travailler directement dans giac. Par exemple pour y definir une fonction:
// Attention: x, declaree(s) comme variable(s) globale(s) // End defining f // Attention: x,y, declaree(s) comme variable(s) globale(s) // End defining g (a,b)->if (a<b) x[a,b];; else if (a>b) -(x[b,a]); ;; , (k,l)->x^k-y^l // Attention: x, declaree(s) comme variable(s) globale(s) // End defining f // Attention: x,y, declaree(s) comme variable(s) globale(s) // End defining g (a,b)->if (a<b) x[a,b];; else if (a>b) -(x[b,a]); ;; , (k,l)->x^k-y^l |
(x[0,1]*x[2,3]*x[4,5]-x[0,1]*x[2,4]*x[3,5]+x[0,1]*x[2,5]*x[3,4]+x[2,3]*x\ [1,4]*x[0,5]-x[2,3]*x[1,5]*x[0,4]-x[4,5]*x[0,2]*x[1,3]+x[4,5]*x[0,3]*x[1\ ,2]-x[2,4]*x[1,3]*x[0,5]+x[2,4]*x[1,5]*x[0,3]+x[3,5]*x[0,2]*x[1,4]-x[3,5\ ]*x[1,2]*x[0,4]+x[2,5]*x[1,3]*x[0,4]-x[2,5]*x[1,4]*x[0,3]-x[3,4]*x[0,2]*\ x[1,5]+x[3,4]*x[1,2]*x[0,5])^2 (x[0,1]*x[2,3]*x[4,5]-x[0,1]*x[2,4]*x[3,5]+x[0,1]*x[2,5]*x[3,4]+x[2,3]*x[1,4]*x[0,5]-x[2,3]*x[1,5]*x[0,4]-x[4,5]*x[0,2]*x[1,3]+x[4,5]*x[0,3]*x[1,2]-x[2,4]*x[1,3]*x[0,5]+x[2,4]*x[1,5]*x[0,3]+x[3,5]*x[0,2]*x[1,4]-x[3,5]*x[1,2]*x[0,4]+x[2,5]*x[1,3]*x[0,4]-x[2,5]*x[1,4]*x[0,3]-x[3,4]*x[0,2]*x[1,5]+x[3,4]*x[1,2]*x[0,5])^2 |
matrix[[0,1-y,1-y^2,1-y^3],[x-1,x-y,x-y^2,x-y^3],[x^2-1,x^2-y,x^2-y^2,x^\ 2-y^3],[x^3-1,x^3-y,x^3-y^2,x^3-y^3]] matrix[[0,1-y,1-y^2,1-y^3],[x-1,x-y,x-y^2,x-y^3],[x^2-1,x^2-y,x^2-y^2,x^2-y^3],[x^3-1,x^3-y,x^3-y^2,x^3-y^3]] |
0,0,(x^3+x^2+x-y^3-y^2-y+sqrt(x^6+2*x^5+3*x^4-14*x^3*y^3+2*x^3*y^2+2*x^3\ *y+6*x^3+2*x^2*y^3-14*x^2*y^2+2*x^2*y+5*x^2+2*x*y^3+2*x*y^2-14*x*y+4*x+y\ ^6+2*y^5+3*y^4+6*y^3+5*y^2+4*y-12))/2,(x^3+x^2+x-y^3-y^2-y-sqrt(x^6+2*x^\ 5+3*x^4-14*x^3*y^3+2*x^3*y^2+2*x^3*y+6*x^3+2*x^2*y^3-14*x^2*y^2+2*x^2*y+\ 5*x^2+2*x*y^3+2*x*y^2-14*x*y+4*x+y^6+2*y^5+3*y^4+6*y^3+5*y^2+4*y-12))/2 0,0,(x^3+x^2+x-y^3-y^2-y+sqrt(x^6+2*x^5+3*x^4-14*x^3*y^3+2*x^3*y^2+2*x^3*y+6*x^3+2*x^2*y^3-14*x^2*y^2+2*x^2*y+5*x^2+2*x*y^3+2*x*y^2-14*x*y+4*x+y^6+2*y^5+3*y^4+6*y^3+5*y^2+4*y-12))/2,(x^3+x^2+x-y^3-y^2-y-sqrt(x^6+2*x^5+3*x^4-14*x^3*y^3+2*x^3*y^2+2*x^3*y+6*x^3+2*x^2*y^3-14*x^2*y^2+2*x^2*y+5*x^2+2*x*y^3+2*x*y^2-14*x*y+4*x+y^6+2*y^5+3*y^4+6*y^3+5*y^2+4*y-12))/2 |
[ 0 -y + 1 -y^2 + 1 -y^3 + 1] [ x - 1 x - y -y^2 + x -y^3 + x] [ x^2 - 1 x^2 - y x^2 - y^2 -y^3 + x^2] [ x^3 - 1 x^3 - y x^3 - y^2 x^3 - y^3] <type 'sage.matrix.matrix_mpolynomial_dense.Matrix_mpolynomial_dense'> [ 0 -y + 1 -y^2 + 1 -y^3 + 1] [ x - 1 x - y -y^2 + x -y^3 + x] [ x^2 - 1 x^2 - y x^2 - y^2 -y^3 + x^2] [ x^3 - 1 x^3 - y x^3 - y^2 x^3 - y^3] <type 'sage.matrix.matrix_mpolynomial_dense.Matrix_mpolynomial_dense'> |
[[0, -y + 1, -y^2 + 1, -y^3 + 1], [x - 1, x - y, -y^2 + x, -y^3 + x], [x^2 - 1, x^2 - y, x^2 - y^2, x^2 - y^3], [x^3 - 1, x^3 - y, x^3 - y^2, x^3 - y^3]] [[0, -y + 1, -y^2 + 1, -y^3 + 1], [x - 1, x - y, -y^2 + x, -y^3 + x], [x^2 - 1, x^2 - y, x^2 - y^2, x^2 - y^3], [x^3 - 1, x^3 - y, x^3 - y^2, x^3 - y^3]] |
[ 0 -y + 1 -y^2 + 1 -y^3 + 1] [ x - 1 x - y -y^2 + x -y^3 + x] [ x^2 - 1 x^2 - y x^2 - y^2 x^2 - y^3] [ x^3 - 1 x^3 - y x^3 - y^2 x^3 - y^3] <type 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'> [ 0 -y + 1 -y^2 + 1 -y^3 + 1] [ x - 1 x - y -y^2 + x -y^3 + x] [ x^2 - 1 x^2 - y x^2 - y^2 x^2 - y^3] [ x^3 - 1 x^3 - y x^3 - y^2 x^3 - y^3] <type 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'> |
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// Giac share root-directory:/usr/share/giac/
File: /usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/giac.py Type: <class 'sage.interfaces.giac.GiacFunction'> Definition: giac.sum(*args, **kwds) Docstring: Help for sum: sum(Expr,Var,VarMin(a),VarMax(b),[VarStep(p)]) Discret sum (with 2 or 4 arguments return then sum from a to b if a<=b or of the opposite of the sum from b+1 to a-1 if a>b+1 or 0 if a=b+1) or the discret primitive or sum of the elements of a list or a sequence See also: 1/ + Ex1:sum(1/n^2,n,1,17) Ex2:sum(1/n^2,n=1..17) Ex3:sum(1/n^2,n,17,1) Ex4:sum(1/n^2,n=17..1) Ex5:sum(1/n^2,n,17,1,1) Ex6:sum(1/n^2,n,1,17,2) Ex7:sum(1,2,3,4) Ex8:sum([[1,2,3,4,5,6,7,8,9],[1,2,3,4,5,6,7,8,9]]) Ex9:sum(1/(x*(x+1)),x) Ex10:sum(cos(n*x),n)
// Giac share root-directory:/usr/share/giac/
File: /usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/giac.py Type: <class 'sage.interfaces.giac.GiacFunction'> Definition: giac.sum(*args, **kwds) Docstring: Help for sum: sum(Expr,Var,VarMin(a),VarMax(b),[VarStep(p)]) Discret sum (with 2 or 4 arguments return then sum from a to b if a<=b or of the opposite of the sum from b+1 to a-1 if a>b+1 or 0 if a=b+1) or the discret primitive or sum of the elements of a list or a sequence See also: 1/ + Ex1:sum(1/n^2,n,1,17) Ex2:sum(1/n^2,n=1..17) Ex3:sum(1/n^2,n,17,1) Ex4:sum(1/n^2,n=17..1) Ex5:sum(1/n^2,n,17,1,1) Ex6:sum(1/n^2,n,1,17,2) Ex7:sum(1,2,3,4) Ex8:sum([[1,2,3,4,5,6,7,8,9],[1,2,3,4,5,6,7,8,9]]) Ex9:sum(1/(x*(x+1)),x) Ex10:sum(cos(n*x),n) |
(pi*exp(pi)^2+pi+exp(pi)^2-1)/(2*exp(pi)^2-2) (pi*exp(pi)^2+pi+exp(pi)^2-1)/(2*exp(pi)^2-2) |
(((((x-95)*(x-4)-1615)*(x-3)-6315)*(x-2)-5954)*(x-1)-734)*x (((((x-95)*(x-4)-1615)*(x-3)-6315)*(x-2)-5954)*(x-1)-734)*x |
Lorsque l'on travaille avec des objets giac des le debut, il n'y a pas beaucoup de temps perdu dans l'interface.
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