Changes between Initial Version and Version 8 of Ticket #14334


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Timestamp:
Jul 17, 2013, 2:52:18 PM (10 years ago)
Author:
chapoton
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  • Ticket #14334

    • Property Status changed from new to needs_review
    • Property Authors changed from to Frédéric Chapoton

  • Ticket #14334 – Description

    initial v8  
    1 So far (in sage 5.7), the integral of multivariable polynomial is not clean, and belongs to the symbolic ring
     1So far (in sage 5.10), the integral of multivariable polynomial is not clean, and belongs to the symbolic ring
    22{{{
    3 sage: x,y = polygen(ZZ,['x','y'])
    4 sage: (x*y).integral()
     3sage: x,y = polygen(QQ, ['x','y'])
     4sage: (x*y).integral(x)
    55Traceback (most recent call last)
    66...
    77AttributeError: 'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular' object has no attribute 'integral'
    8 
     8}}}
     9But one can do this:
     10{{{
    911sage: integrate(x*y,x)
    10121/2*x^2*y
    … …  
    1517It would be much better to have a .integral attribute and to stay within polynomial rings, like it happens with just one variable
    1618{{{
    17 sage: x = polygen(ZZ,'x')
     19sage: x = polygen(QQ, 'x')
    1820sage: x.integral().parent()
    1921Univariate Polynomial Ring in x over Rational Field