#6286: Inconsistence typesettings of PrimitiveFunctions and SFunctions
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Reporter: gmhossain | Owner: burcin
Type: defect | Status: assigned
Priority: major | Milestone: sage-4.0.2
Component: symbolics | Keywords:
Reviewer: | Author:
Merged: |
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Description changed by gmhossain:
Old description:
> In sage-4.0.1, most of the primitive functions suffer from
> inconsistence typsettings. For example:
>
> {{{
> f = arcsin
> latex( f ); latex( f(x) ); latex( f(x,1) )
>
> \sin^{-1}
> \arcsin\left(x\right)
> \mbox{\sin^{-1}}\left(x\right)
> }}}
>
> Note that the same function is being typeset differently. The additional
> "\mbox" in third case (which has been reported in
> #6268) will get resolved by #5711.
>
> However, second case seems weird to me, given "class Function_arcsin"
> (sage.functions.trig) clearly defines its
> latex expression to be "\sin^{-1}". So it seems to be a pynac issue.
>
> One can try following to see the issues for other functions
>
> {{{
> # Trigonometric functions
> lst = [sin, cos, tan, cot, sec, csc, arcsin, arccos, arctan, arccot,
> arcsec, arccsc]
>
> # view
> for fn in lst:
> view( fn ); view( fn(x) ); view( fn(x,1) )
>
> # latex
> for fn in lst:
> latex( fn ); latex( fn(x) ); latex( fn(x,1) )
> }}}
>
> and
>
> {{{
> # Hyperbolic functions
> lst = [sinh, cosh, tanh, coth, sech, csch, arcsinh, arccosh, arctanh,
> arccoth, arcsech, arccsch ]
>
> # view
> for fn in lst:
> view( fn ); view( fn(x) ); view( fn(x,1) )
>
> # latex
> for fn in lst:
> latex( fn ); latex( fn(x) ); latex( fn(x,1) )
> }}}
>
> It seems, out of these 24 functions, 18 functions suffer from
> inconsistence typesetting.
New description:
In sage-4.0.1, most of the primitive functions suffer from
inconsistence typsettings. For example:
{{{
f = arcsin
latex( f ); latex( f(x) ); latex( f(x,1) )
\sin^{-1}
\arcsin\left(x\right)
\mbox{\sin^{-1}}\left(x\right)
}}}
Note that the same function is being typeset differently. The additional
"\mbox" in third case (which has been reported in
#6268) will get resolved by #5711.
However, second case seems weird to me, given "class Function_arcsin"
(sage.functions.trig) clearly defines its
latex expression to be "\sin^{-1}". So it seems to be a pynac issue.
One can try following to see the issues for other functions
{{{
# Trigonometric functions
lst = [sin, cos, tan, cot, sec, csc, arcsin, arccos, arctan, arccot,
arcsec, arccsc]
# view
for fn in lst:
view( fn ); view( fn(x) ); view( fn(x,1) )
# latex
for fn in lst:
latex( fn ); latex( fn(x) ); latex( fn(x,1) )
}}}
and
{{{
# Hyperbolic functions
lst = [sinh, cosh, tanh, coth, sech, csch, arcsinh, arccosh, arctanh,
arccoth, arcsech, arccsch ]
# view
for fn in lst:
view( fn ); view( fn(x) ); view( fn(x,1) )
# latex
for fn in lst:
latex( fn ); latex( fn(x) ); latex( fn(x,1) )
}}}
It seems, out of these 24 functions, 18 functions suffer from
inconsistence typesetting.
'''Note:''' Unlike latex aliases such as "\sinh" (which
is alias for "{\rm sinh}" ) there are no alias such as "\sech".
However, this alias is used currently in "sech" function which leads to
latex error. The function should be represented as "{\rm sech}" and
similar typesetting should be used for "csch" and others.
'''SFunctions:''' In current pynac, default typesetting used for a
symbolic function say "myfunc" is "\mbox{myfunc}".
This seems highly inconsistent from the rest. If a function named "sin" is
typseset as "\sin" (=>"{\rm sin}") then why should another function named
"mysin" be typeset as "\mbox{mysin}"? I guess, we should follow a
consistent standard.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6286#comment:2>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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