# 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>