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Mirrors > Home > MPE Home > Th. List > Mathboxes > moel | Structured version Visualization version Unicode version |
Description: "At most one" element in a set. (Contributed by Thierry Arnoux, 26-Jul-2018.) |
Ref | Expression |
---|---|
moel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ralcom4 3224 | . 2 | |
2 | df-ral 2917 | . . 3 | |
3 | 2 | ralbii 2980 | . 2 |
4 | alcom 2037 | . . 3 | |
5 | eleq1 2689 | . . . 4 | |
6 | 5 | mo4 2517 | . . 3 |
7 | df-ral 2917 | . . . . 5 | |
8 | impexp 462 | . . . . . 6 | |
9 | 8 | albii 1747 | . . . . 5 |
10 | 7, 9 | bitr4i 267 | . . . 4 |
11 | 10 | albii 1747 | . . 3 |
12 | 4, 6, 11 | 3bitr4i 292 | . 2 |
13 | 1, 3, 12 | 3bitr4ri 293 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wal 1481 wcel 1990 wmo 2471 wral 2912 |
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 |
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-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-v 3202 |
This theorem is referenced by: disjnf 29384 |
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