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Mirrors > Home > MPE Home > Th. List > Mathboxes > df-bj-minfty | Structured version Visualization version GIF version |
Description: Definition of -∞. (Contributed by BJ, 27-Jun-2019.) |
Ref | Expression |
---|---|
df-bj-minfty | ⊢ -∞ = (inftyexpi ‘π) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cminfty 33110 | . 2 class -∞ | |
2 | cpi 14797 | . . 3 class π | |
3 | cinftyexpi 33093 | . . 3 class inftyexpi | |
4 | 2, 3 | cfv 5888 | . 2 class (inftyexpi ‘π) |
5 | 1, 4 | wceq 1483 | 1 wff -∞ = (inftyexpi ‘π) |
Colors of variables: wff setvar class |
This definition is referenced by: bj-minftyccb 33112 bj-minftynrr 33113 bj-pinftynminfty 33114 |
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