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Mirrors > Home > MPE Home > Th. List > pwne0 | Structured version Visualization version Unicode version |
Description: A power class is never empty. (Contributed by NM, 3-Sep-2018.) |
Ref | Expression |
---|---|
pwne0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0elpw 4834 | . 2 | |
2 | 1 | ne0ii 3923 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wne 2794 c0 3915 cpw 4158 |
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-nul 4789 |
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-ne 2795 df-v 3202 df-dif 3577 df-in 3581 df-ss 3588 df-nul 3916 df-pw 4160 |
This theorem is referenced by: undefne0 7405 |
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