Revision history [back]

Well after using the code a couple days, I modified it again and here is a better version. E.g. now 2+(1-sqrt(3))i is typeset as shown v.s. as 2+i+sqrt(3)i in the previous version.

<codes>
def cpx(z):
    r"""
    Return a LaTeX string for this complex number.

    EXAMPLE::

        sage: latex_of_complex(0)
        0
        sage: latex_of_complex(2)
        2
        sage: latex_of_complex(4*i)
        4 \mathbf{i}
        sage: latex_of_complex(7 + 8*i)
        7 + 8 \mathbf{i}
    """
    if z == 0:
        return LatexExpr('0')
    re = z.real().simplify()
    im = z.imag().simplify()
    if (re == 0) or (im==0) :
        return LatexExpr(latex(z).replace('i',r'\mathbf{i}'))
    elif im > 0:
      s = '+'
    else:
      s = '-'
    rel = latex(re)
    iml = latex(abs(im))
    if rel.find('+') >= 1 or rel.find('-') >=1:
        repl = r'\left('+rel+r'\right)'
    else:
        repl = rel
    if iml.find('+') >=1 or iml.find('-') >=1:
        impl = r'\left('+iml+r'\right)'+r'\mathbf{i}'
    else:
        impl = iml+r'\mathbf{i}'
    if abs(im) ==1:
       return LatexExpr(repl + s + r'\mathbf{i}')
    return LatexExpr(repl + s + impl)
</codes>

Well after using the code a couple days, I modified it again and here is a better version. E.g. now 2+(1-sqrt(3))i is typeset as shown v.s. as 2+i+sqrt(3)i in the previous version.

<codes>
 def cpx(z):
    r"""
    Return a LaTeX string for this complex number.

    EXAMPLE::

        sage: latex_of_complex(0)
        0
        sage: latex_of_complex(2)
        2
        sage: latex_of_complex(4*i)
        4 \mathbf{i}
        sage: latex_of_complex(7 + 8*i)
        7 + 8 \mathbf{i}
    """
    if z == 0:
        return LatexExpr('0')
    re = z.real().simplify()
    im = z.imag().simplify()
    if (re == 0) or (im==0) :
        return LatexExpr(latex(z).replace('i',r'\mathbf{i}'))
    elif im > 0:
      s = '+'
    else:
      s = '-'
    rel = latex(re)
    iml = latex(abs(im))
    if rel.find('+') >= 1 or rel.find('-') >=1:
        repl = r'\left('+rel+r'\right)'
    else:
        repl = rel
    if iml.find('+') >=1 or iml.find('-') >=1:
        impl = r'\left('+iml+r'\right)'+r'\mathbf{i}'
    else:
        impl = iml+r'\mathbf{i}'
    if abs(im) ==1:
       return LatexExpr(repl + s + r'\mathbf{i}')
    return LatexExpr(repl + s + impl)
</codes>