I am an old geek trying to relearn mathematics that I knew 45 years ago. I am beginning to read a basic introduction to rigorous mathematics and need to ask a question about notation. Be patient, I am unsure whether I can use Latex to express it in this interface, so I am going to phrase it out as best that I can in English. The book expresses the set union relationship as follows:

A union B equals Left Brace x is in A pipe symbol x is in B right bracket.

Now to my knowledge, the pipe symbol in mathematics is "such that". However I would read what I think it says as:

A union B equals left brace x is in A and x is in B right brace

The author of the book is a distinguished mathematician, ergo sum I assume I am misunderstanding somehow. Can the pipe symbol be read as "and"?

nmgeek

A union B equals Left Brace x is in A pipe symbol x is in B right bracket.

Now to my knowledge, the pipe symbol in mathematics is "such that". However I would read what I think it says as:

A union B equals left brace x is in A and x is in B right brace

The author of the book is a distinguished mathematician, ergo sum I assume I am misunderstanding somehow. Can the pipe symbol be read as "and"?

nmgeek

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