MyWikiBiz, Author Your Legacy — Wednesday November 05, 2025
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, 15:05, 15 April 2013
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| − | Consider a relation <math>L\!</math> of the following type.
| + | [The following piece occurs in § 6.35.] |
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| − | {| align="center" cellspacing="8" width="90%"
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| − | | <math>L : \texttt{(} S \texttt{(} T \texttt{))}\!</math>
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| − | [The following piece occurs in § 6.35] | |
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| | The set of triples of dyadic relations, with pairwise cartesian products chosen in a pre-arranged order from a triple of three sets <math>(X, Y, Z),\!</math> is called the ''dyadic explosion'' of <math>X \times Y \times Z.\!</math> This object is denoted <math>\operatorname{Explo}(X, Y, Z ~|~ 2),\!</math> read as the ''explosion of <math>X \times Y \times Z\!</math> by twos'', or more simply as <math>X, Y, Z ~\operatorname{choose}~ 2,\!</math> and defined as follows: | | The set of triples of dyadic relations, with pairwise cartesian products chosen in a pre-arranged order from a triple of three sets <math>(X, Y, Z),\!</math> is called the ''dyadic explosion'' of <math>X \times Y \times Z.\!</math> This object is denoted <math>\operatorname{Explo}(X, Y, Z ~|~ 2),\!</math> read as the ''explosion of <math>X \times Y \times Z\!</math> by twos'', or more simply as <math>X, Y, Z ~\operatorname{choose}~ 2,\!</math> and defined as follows: |
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| | {| align="center" cellspacing="8" width="90%" | | {| align="center" cellspacing="8" width="90%" |
| − | | <math>\operatorname{Explo}(X, Y, Z ~|~ 2) ~=~ \operatorname{Pow}(X \times Y) \times \operatorname{Pow}(X \times Z) \times \operatorname{Pow}(Y \times Z).\!</math> | + | | <math>\operatorname{Explo}(X, Y, Z ~|~ 2) ~=~ \operatorname{Pow}(X \times Y) \times \operatorname{Pow}(X \times Z) \times \operatorname{Pow}(Y \times Z)\!</math> |
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| | {| align="center" cellspacing="8" width="90%" | | {| align="center" cellspacing="8" width="90%" |
| − | | <math>2^{XY} \times 2^{XZ} \times 2^{YZ} ~=~ 2^{(XY + XY + YZ)},\!</math> | + | | <math>2^{XY} \times 2^{XZ} \times 2^{YZ} ~=~ 2^{(XY + XY + YZ)}\!</math> |
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