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Mirrors > Home > MPE Home > Th. List > pm11.07 | Structured version Visualization version GIF version |
Description: Axiom *11.07 in [WhiteheadRussell] p. 159. The original reads: *11.07 "Whatever possible argument 𝑥 may be, 𝜑(𝑥, 𝑦) is true whatever possible argument 𝑦 may be" implies the corresponding statement with 𝑥 and 𝑦 interchanged except in "𝜑(𝑥, 𝑦)". Under our formalism this appears to correspond to idi 1 and not to sbcom4 2415 as earlier thought. See https://groups.google.com/d/msg/metamath/iS0fOvSemC8/M1zTH8wxCAAJ. (Contributed by BJ, 16-Sep-2018.) (New usage is discouraged.) |
Ref | Expression |
---|---|
pm11.07.1 | ⊢ 𝜑 |
Ref | Expression |
---|---|
pm11.07 | ⊢ 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm11.07.1 | 1 ⊢ 𝜑 |
Colors of variables: wff setvar class |
This theorem is referenced by: (None) |
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