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Theorem mathbox 12871
Description: (This theorem is a dummy placeholder for these guidelines. The label of this theorem, "mathbox", is hard-coded into the Metamath program to identify the start of the mathbox section for web page generation.)

A "mathbox" is a user-contributed section that is maintained by its contributor independently from the main part of iset.mm.

For contributors:

By making a contribution, you agree to release it into the public domain, according to the statement at the beginning of iset.mm.

Guidelines:

Mathboxes in iset.mm follow the same practices as in set.mm, so refer to the mathbox guidelines there for more details.

(Contributed by NM, 20-Feb-2007.) (Revised by the Metamath team, 9-Sep-2023.) (New usage is discouraged.)

Hypothesis
Ref Expression
mathbox.1  |-  ph
Assertion
Ref Expression
mathbox  |-  ph

Proof of Theorem mathbox
StepHypRef Expression
1 mathbox.1 1  |-  ph
Colors of variables: wff set class
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator