Uwe thank you any other time for your comments, but I think you are wrong
about the strict rules to typeset formulas, at least in the trigonometric
formulas. For example when you say,
(when the "sin" would not be upright, it would even mean s*i*n*1/2)
you don't remember the "lineal functions" (archs) in a circle that are typed
with the first letter upright, like this:
Sin AM
without brackets; a little more space between "Sin" and "AM" is all that it
is needed. The trigonometrical functions are the lineal functions in a
circle with the radius equal to the unity of mesaure. Then:
Sin AM/R=sin a (R = radius)
where "a" is the angle that subtends the "AM" arch. And also in this case
that suffits the space between "Sin" and "AM/R" and "sin" and "a" to
understand correctly the formula.
And more, in the trigonometric formulas the strict notation "sin(a)" is
normally not used but "sin a", like "sin 2a", "sin (A+B)" and so on, and I
think that there aren't confussion about this. And if you type this formulas
in LaTeX math mode an aditional space is added between the function and the
argument.
If you want to search a little that exists more secondary circular functions
(due to spanish mariner Mendoza) not used today named "Sin v AM" (Seno
verso), "Cos v AM" (Coseno verso), and also "Ver AM" (Verso of AM) or "Cov
AM" (Coverso of AM) and "Sub v AM" (Subverso of AM). Without brackets.
Regards Yago.
----- Original Message -----
From: "Uwe Stöhr" <uwesto...@web.de>
To: "Yago" <diazd...@ono.com>
Cc: "LyX-Users" <lyx-users@lists.lyx.org>
Sent: Friday, September 11, 2009 7:18 PM
Subject: Re: Vertical spacing of matrices
Yago schrieb:
Respect to your second kindly comment, in the Spanish Navy Naval Military
School (I am Commander in the Spanish Navy, Hydrographer) the brackets
are omited in the notation to the half addition or difference of
trigonometrical functions because the formula,
sin1/2(A+B)
in purity is the product of sin1/2 (I suppose in radians) and the
addition of the angles A and B (also in radians).
There are strict rules in math how to typeset formulas.
sin1/2
means
sin*1/2
(when the "sin" would not be upright, it would even mean s*i*n*1/2)
So "sin" is in your typesetting a variable or an operator but not a
function. A function has to have an argument. For arguments round brackets
are used:
sin(0.5(a+b))
When you have several levels of brackets it is allowed to use brackets for
the outer ones:
sin[0.5(a+b)]
although this is quite unusual. Normally one uses larger round brackets
for the outer level and smaller ones for the inner level as explained in
LyX's Math manual.
Reading
sin1/2(a+b)
I first thought that you mean
sqrt(sin(a+b))
although the 1/2 would then have to be set as superscript.
You definitively need a bracket behind sin and the like, no matter where
you are working. Math is the same all over the world and it is important
that everybody can understand what you are writing.
regards Uwe
