@Chapter
   @Title { Equations }
   @Tag { equations }
@Begin
@LP
This chapter explains how to produce mathematical formulas in Lout,
equations. @Index { equations }
mathematics. @Index mathematics
equations. @RawIndex { equations }
equations.eq @SubIndex { @Code "@Eq" }
eq.equations @Index { @Code "@Eq" (equations) }
using the @Code "@Eq" symbol like this:
@ID @Code {
"@Eq { big int supp 1 on 0 ` dx over sqrt {1 - x sup 2} = pi over 2 }"
}
This example produces
@ID @Eq { big int supp 1 on 0 ` dx over sqrt {1 - x sup 2} = pi over 2 }
The @Code "@Eq" symbol looks after all the details of spacing for
you, and it provides several hundred mathematical symbols.
@BeginSections
@Include { equ_intr }
@Include { equ_symb }
@Include { equ_vert }
@Include { equ_spac }
@Include { equ_disp }
@Include { equ_defs }
@Include { equ_summ }
# @Include { equ_tequ } apparently not offered any more, forget why
@Include { equ_math }
@EndSections
@End @Chapter