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Mirrors > Home > MPE Home > Th. List > zfinf2 | Structured version Visualization version Unicode version |
Description: A standard version of the Axiom of Infinity, using definitions to abbreviate. Axiom Inf of [BellMachover] p. 472. (See ax-inf2 8538 for the unabbreviated version.) (Contributed by NM, 30-Aug-1993.) |
Ref | Expression |
---|---|
zfinf2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-inf2 8538 | . 2 | |
2 | 0el 3939 | . . . . 5 | |
3 | df-rex 2918 | . . . . 5 | |
4 | 2, 3 | bitri 264 | . . . 4 |
5 | sucel 5798 | . . . . . . 7 | |
6 | df-rex 2918 | . . . . . . 7 | |
7 | 5, 6 | bitri 264 | . . . . . 6 |
8 | 7 | ralbii 2980 | . . . . 5 |
9 | df-ral 2917 | . . . . 5 | |
10 | 8, 9 | bitri 264 | . . . 4 |
11 | 4, 10 | anbi12i 733 | . . 3 |
12 | 11 | exbii 1774 | . 2 |
13 | 1, 12 | mpbir 221 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wb 196 wo 383 wa 384 wal 1481 wex 1704 wcel 1990 wral 2912 wrex 2913 c0 3915 csuc 5725 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-inf2 8538 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-v 3202 df-dif 3577 df-un 3579 df-nul 3916 df-sn 4178 df-suc 5729 |
This theorem is referenced by: omex 8540 |
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