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## Declaring math symbols

\DeclareMathSymbol {<symbol>} {<type>} {<sym-font>} {<slot>}

The <symbol> can be either a single character such as >>', or a macro name, such as \sum. Defines the <symbol> to be a math symbol of type <type> in slot <slot> of symbol font <sym-font>. The <type> can be given as a number or as a command:

 Type Meaning Example 0 or \mathord  Ordinary 1 or \mathop  Large operator 2 or \mathbin  Binary operation 3 or \mathrel  Relation 4 or \mathopen  Opening 5 or \mathclose Closing 6 or \mathpunct Punctuation ; 7 or \mathalpha Alphabet character A
Only symbols of type \mathalpha will be affected by math alphabet commands: within the argument of a math alphabet command they will produce the character in slot <slot> of that math alphabet's font. Symbols of other types will always produce the same symbol (within one math version). \DeclareMathSymbol allows a macro <symbol> to be redefined only if it was previously defined to be a math symbol. It also checks that the <sym-font> is a declared symbol font. Example:
   \DeclareMathSymbol{\alpha}{0}{letters}{"0B}
\DeclareMathSymbol{\lessdot}{\mathbin}{AMSb}{"0C}
\DeclareMathSymbol{\alphld}{\mathalpha}{AMSb}{"0C}


\DeclareMathDelimiter {<cmd>} {<type>} {<sym-font-1>} {<slot-1>}
{<sym-font-2>} {<slot-2>}

Defines <cmd> to be a math delimiter where the small variant is in slot <slot-1> of symbol font <sym-font-1> and the large variant is in slot <slot-2> of symbol font <sym-font-2>. Both symbol fonts must have been declared previously. Checks that <sym-font-i> are both declared symbol fonts. If TEX is not looking for a delimiter, <cmd> is treated just as if it had been defined with \DeclareMathSymbol using <type>, <sym-font-1> and <slot-1>. In other words, if a command is defined as a delimiter then this automatically defines it as a math symbol.

In case <cmd> is a single character such as [', the same syntax is used. Previously the {<type>} argument was not present (and thus the corresponding math symbol declaration had to be provided seperately). Example:

   \DeclareMathDelimiter{\langle}{\mathopen}{symbols}{"68}
{largesymbols}{"0A}
\DeclareMathDelimiter{(}      {\mathopen}{operators}{"28}
{largesymbols}{"00}


\DeclareMathAccent {<cmd>} {<type>} {<sym-font>} {<slot>}

Defines <cmd> to act as a math accent. The accent character comes from slot <slot> in <sym-font>. The <type> can be either \mathord or \mathalpha; in the latter case the accent character changes font when used in a math alphabet. Example:

   \DeclareMathAccent{\acute}{\mathalpha}{operators}{"13}
\DeclareMathAccent{\vec}{\mathord}{letters}{"7E}


\DeclareMathRadical {<cmd>} {<sym-font-1>} {<slot-1>}
{<sym-font-2>} {<slot-2>}

Defines <cmd> to be a radical where the small variant is in slot <slot-1> of symbol font <sym-font-1> and the large variant is in slot <slot-2> of symbol font <sym-font-2>. Both symbol fonts must have been declared previously. Example (probably the only use for it!):

   \DeclareMathRadical{\sqrt}{symbols}{"70}{largesymbols}{"70}


Next: Declaring math sizes Up: Math fonts Previous: Declaring symbol fonts
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1999-07-12