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Mirrors > Home > MPE Home > Th. List > 19.21tOLDOLD | Structured version Visualization version Unicode version |
Description: Obsolete proof of 19.21t 2073 as of 3-Nov-2021. (Contributed by NM, 27-May-1997.) (Revised by Mario Carneiro, 24-Sep-2016.) (Proof shortened by Wolf Lammen, 3-Jan-2018.) df-nf 1710 changed. (Revised by Wolf Lammen, 11-Sep-2021.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
19.21tOLDOLD |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nf5r 2064 | . . 3 | |
2 | alim 1738 | . . 3 | |
3 | 1, 2 | syl9 77 | . 2 |
4 | 19.9t 2071 | . . . 4 | |
5 | 4 | imbi1d 331 | . . 3 |
6 | 19.38 1766 | . . 3 | |
7 | 5, 6 | syl6bir 244 | . 2 |
8 | 3, 7 | impbid 202 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wal 1481 wex 1704 wnf 1708 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-12 2047 |
This theorem depends on definitions: df-bi 197 df-ex 1705 df-nf 1710 |
This theorem is referenced by: (None) |
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