Stratified operations on maniplexes Article Swipe
YOU?
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· 2022
· Open Access
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· DOI: https://doi.org/10.5802/alco.208
· OA: W4229011128
There is an increasingly extensive literature on the problem of describing the connection (monodromy) groups and automorphism groups of families of polytopes and maniplexes that are not regular or reflexible. Many such polytopes and maniplexes arise as the result of constructions such as truncations and products. Here we show that for a wide variety of these constructions, the connection group of the output can be described in a nice way in terms of the connection group of the input. We call such operations stratified . Moreover, we show that, if <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>F</mml:mi></mml:math> is a maniplex operation in one of two broad subclasses of stratified operations, and if <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ℛ</mml:mi></mml:math> is the smallest reflexible cover of some maniplex <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ℳ</mml:mi></mml:math>, then the connection group of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>F</mml:mi><mml:mo>(</mml:mo><mml:mi>ℛ</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> is equal to the connection group of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>F</mml:mi><mml:mo>(</mml:mo><mml:mi>ℳ</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>. In particular, we show that this is true for truncations and medials of maps, for products of polytopes (including pyramids and prisms over polytopes), and for the mix of maniplexes. As an application, we determine the smallest reflexible covers of the pyramids over the equivelar toroidal maps.
