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made some more changes
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Marina Anagnostopoulou-Merkouri authored and james-d-mitchell committed May 26, 2021
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7 changes: 5 additions & 2 deletions doc/examples.xml
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Expand Up @@ -543,10 +543,13 @@ true]]></Example>
directed edges. The <M>n</M>th Pancake graph is the Cayley graph of the
hyperoctahedral group acting on <C>[<A>-n</A> .. -1, 1 .. <A>n</A>]</C> with respect to the
generating set consisting of the <Q>prefix reversals</Q>, which are defined in exactly
the same way as in <Ref Attr="PancakeGraph"/>. The hyperoctahedral group consists of
the same way as in <Ref Oper="PancakeGraph"/>. The hyperoctahedral group consists of
permutations <M>p</M> acting on <C>[<A>-n</A> .. -1, 1 .. <A>n</A>]</C>, where the image
of any arbitrary point <M>i</M> in <C>[<A>-n</A> .. -1, 1 .. <A>n</A>]</C> is equal to the
of every point <M>i</M> in <C>[<A>-n</A> .. -1, 1 .. <A>n</A>]</C> is equal to the
negative of the image of <M>-i</M> under <M>p</M>.
GAP only works with permutations of positive integers and so <C>BurntPancakeGraph</C> returns
the Cayley graph of the hyperoctahedral group acting on <C>[1 .. <A>2n</A>]</C> instead of
<C>[<A>-n</A> .. -1, 1 .. <A>n</A>]</C>.
If the optional first argument <A>filt</A> is not present, then <Ref
Filt="IsImmutableDigraph"/> is used by default.<P/>

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