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Mirrors > Home > MPE Home > Th. List > Mathboxes > sspwtrALT2 | Structured version Visualization version Unicode version |
Description: Short predicate calculus proof of the right-to-left implication of dftr4 4757. A class which is a subclass of its power class is transitive. This proof was constructed by applying Metamath's minimize command to the proof of sspwtrALT 39049, which is the virtual deduction proof sspwtr 39048 without virtual deductions. (Contributed by Alan Sare, 3-May-2011.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
sspwtrALT2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssel 3597 | . . . . . 6 | |
2 | 1 | adantld 483 | . . . . 5 |
3 | elpwi 4168 | . . . . 5 | |
4 | 2, 3 | syl6 35 | . . . 4 |
5 | simpl 473 | . . . . 5 | |
6 | 5 | a1i 11 | . . . 4 |
7 | ssel 3597 | . . . 4 | |
8 | 4, 6, 7 | syl6c 70 | . . 3 |
9 | 8 | alrimivv 1856 | . 2 |
10 | dftr2 4754 | . 2 | |
11 | 9, 10 | sylibr 224 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wal 1481 wcel 1990 wss 3574 cpw 4158 wtr 4752 |
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-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-in 3581 df-ss 3588 df-pw 4160 df-uni 4437 df-tr 4753 |
This theorem is referenced by: (None) |
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