Can relax be replaced by a space?
LaTeX defines vec as
DeclareMathAccent{vec}{mathord}{letters}{"7E}
which eventually is expanded to
mathaccent"017Erelax
whereas plainTeX defines it as
defvec{mathaccent"017E }
replacing relax with a space.
Is there any practical difference?
macros tex-core
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
add a comment |
LaTeX defines vec as
DeclareMathAccent{vec}{mathord}{letters}{"7E}
which eventually is expanded to
mathaccent"017Erelax
whereas plainTeX defines it as
defvec{mathaccent"017E }
replacing relax with a space.
Is there any practical difference?
macros tex-core
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
add a comment |
LaTeX defines vec as
DeclareMathAccent{vec}{mathord}{letters}{"7E}
which eventually is expanded to
mathaccent"017Erelax
whereas plainTeX defines it as
defvec{mathaccent"017E }
replacing relax with a space.
Is there any practical difference?
macros tex-core
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
LaTeX defines vec as
DeclareMathAccent{vec}{mathord}{letters}{"7E}
which eventually is expanded to
mathaccent"017Erelax
whereas plainTeX defines it as
defvec{mathaccent"017E }
replacing relax with a space.
Is there any practical difference?
macros tex-core
macros tex-core
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
edited 3 hours ago
EuklidAlexandria
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
asked 3 hours ago
EuklidAlexandriaEuklidAlexandria
26117
26117
add a comment |
add a comment |
1 Answer
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The syntax for mathaccent is (TeXbook, p. 291)
mathaccent⟨15-bit number⟩⟨math field⟩
A ⟨15-bit number⟩ is an integer (in any denotation allowed by LaTeX) in the range 0–215. What's a ⟨math field⟩? We find it on page 289
⟨math field⟩ → ⟨filler⟩⟨math symbol⟩ | ⟨filler⟩
{⟨math mode material⟩}
A ⟨filler⟩ is any sequence of space tokens and relax tokens which are ignored (doing expansion) when processing the input stream looking for something that fits the syntax rule.
Thus in LaTeX the relax will be gobbled as a ⟨filler⟩, whereas in plain TeX the space terminates the specification for the number and is ignored as well.
Why does LaTeX use relax? The answer is in the definition of DeclareMathAccent that internally uses set@mathaccent:
% latex.ltx, line 3596:
defset@mathaccent#1#2#3#4{%
xdef#2{mathaccent"mathchar@type#3hexnumber@#1#4relax}}
The choice might depend on the fact that when writing to an auxiliary file relax is better suited to the job.
answered 2 hours ago
egregegreg
720k8719093208
add a comment |
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1 Answer
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1 Answer
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The syntax for mathaccent is (TeXbook, p. 291)
mathaccent⟨15-bit number⟩⟨math field⟩
A ⟨15-bit number⟩ is an integer (in any denotation allowed by LaTeX) in the range 0–215. What's a ⟨math field⟩? We find it on page 289
⟨math field⟩ → ⟨filler⟩⟨math symbol⟩ | ⟨filler⟩
{⟨math mode material⟩}
A ⟨filler⟩ is any sequence of space tokens and relax tokens which are ignored (doing expansion) when processing the input stream looking for something that fits the syntax rule.
Thus in LaTeX the relax will be gobbled as a ⟨filler⟩, whereas in plain TeX the space terminates the specification for the number and is ignored as well.
Why does LaTeX use relax? The answer is in the definition of DeclareMathAccent that internally uses set@mathaccent:
% latex.ltx, line 3596:
defset@mathaccent#1#2#3#4{%
xdef#2{mathaccent"mathchar@type#3hexnumber@#1#4relax}}
The choice might depend on the fact that when writing to an auxiliary file relax is better suited to the job.
answered 2 hours ago
egregegreg
720k8719093208
add a comment |
The syntax for mathaccent is (TeXbook, p. 291)
mathaccent⟨15-bit number⟩⟨math field⟩
A ⟨15-bit number⟩ is an integer (in any denotation allowed by LaTeX) in the range 0–215. What's a ⟨math field⟩? We find it on page 289
⟨math field⟩ → ⟨filler⟩⟨math symbol⟩ | ⟨filler⟩
{⟨math mode material⟩}
A ⟨filler⟩ is any sequence of space tokens and relax tokens which are ignored (doing expansion) when processing the input stream looking for something that fits the syntax rule.
Thus in LaTeX the relax will be gobbled as a ⟨filler⟩, whereas in plain TeX the space terminates the specification for the number and is ignored as well.
Why does LaTeX use relax? The answer is in the definition of DeclareMathAccent that internally uses set@mathaccent:
% latex.ltx, line 3596:
defset@mathaccent#1#2#3#4{%
xdef#2{mathaccent"mathchar@type#3hexnumber@#1#4relax}}
The choice might depend on the fact that when writing to an auxiliary file relax is better suited to the job.
answered 2 hours ago
egregegreg
720k8719093208
add a comment |
The syntax for mathaccent is (TeXbook, p. 291)
mathaccent⟨15-bit number⟩⟨math field⟩
A ⟨15-bit number⟩ is an integer (in any denotation allowed by LaTeX) in the range 0–215. What's a ⟨math field⟩? We find it on page 289
⟨math field⟩ → ⟨filler⟩⟨math symbol⟩ | ⟨filler⟩
{⟨math mode material⟩}
A ⟨filler⟩ is any sequence of space tokens and relax tokens which are ignored (doing expansion) when processing the input stream looking for something that fits the syntax rule.
Thus in LaTeX the relax will be gobbled as a ⟨filler⟩, whereas in plain TeX the space terminates the specification for the number and is ignored as well.
Why does LaTeX use relax? The answer is in the definition of DeclareMathAccent that internally uses set@mathaccent:
% latex.ltx, line 3596:
defset@mathaccent#1#2#3#4{%
xdef#2{mathaccent"mathchar@type#3hexnumber@#1#4relax}}
The choice might depend on the fact that when writing to an auxiliary file relax is better suited to the job.
answered 2 hours ago
egregegreg
720k8719093208
The syntax for mathaccent is (TeXbook, p. 291)
mathaccent⟨15-bit number⟩⟨math field⟩
A ⟨15-bit number⟩ is an integer (in any denotation allowed by LaTeX) in the range 0–215. What's a ⟨math field⟩? We find it on page 289
⟨math field⟩ → ⟨filler⟩⟨math symbol⟩ | ⟨filler⟩
{⟨math mode material⟩}
A ⟨filler⟩ is any sequence of space tokens and relax tokens which are ignored (doing expansion) when processing the input stream looking for something that fits the syntax rule.
Thus in LaTeX the relax will be gobbled as a ⟨filler⟩, whereas in plain TeX the space terminates the specification for the number and is ignored as well.
Why does LaTeX use relax? The answer is in the definition of DeclareMathAccent that internally uses set@mathaccent:
% latex.ltx, line 3596:
defset@mathaccent#1#2#3#4{%
xdef#2{mathaccent"mathchar@type#3hexnumber@#1#4relax}}
The choice might depend on the fact that when writing to an auxiliary file relax is better suited to the job.
answered 2 hours ago
egregegreg
720k8719093208
edited 2 hours ago
answered 2 hours ago
egregegreg
720k8719093208
answered 2 hours ago
egregegreg
720k8719093208
answered 2 hours ago
egregegreg
720k8719093208
720k8719093208
add a comment |
add a comment |
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