Diagonal intersection is a term used in mathematics If <math>\langle S_i\rangle_{i<\alpha}</math> is a sequence then the diagonal intersection, <math>\Delta_{i<\alpha} S_i</math> is defined to be <math>\{\beta<\alpha\mid\beta\in \bigcap_{\gamma<\beta} S_\gamma\}</math>.

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  • Diagonal intersection is a term used in mathematics If <math>\langle S_i\rangle_{i<\alpha}</math> is a sequence then the diagonal intersection, <math>\Delta_{i<\alpha} S_i</math> is defined to be <math>\{\beta<\alpha\mid\beta\in \bigcap_{\gamma<\beta} S_\gamma\}</math>. That is, <math>\beta</math> is in <math>\Delta_{i<\alpha} S_i</math> if it is contained in the first <math>\beta</math> members of the sequence.
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  • diagonal intersection
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  • Diagonal intersection is a term used in mathematics If <math>\langle S_i\rangle_{i<\alpha}</math> is a sequence then the diagonal intersection, <math>\Delta_{i<\alpha} S_i</math> is defined to be <math>\{\beta<\alpha\mid\beta\in \bigcap_{\gamma<\beta} S_\gamma\}</math>.
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  • Diagonal intersection
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