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Mirrors > Home > MPE Home > Th. List > prss | Structured version Visualization version GIF version |
Description: A pair of elements of a class is a subset of the class. Theorem 7.5 of [Quine] p. 49. (Contributed by NM, 30-May-1994.) (Proof shortened by Andrew Salmon, 29-Jun-2011.) (Proof shortened by JJ, 23-Jul-2021.) |
Ref | Expression |
---|---|
prss.1 | ⊢ 𝐴 ∈ V |
prss.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
prss | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) ↔ {𝐴, 𝐵} ⊆ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prss.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | prss.2 | . 2 ⊢ 𝐵 ∈ V | |
3 | prssg 4350 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) ↔ {𝐴, 𝐵} ⊆ 𝐶)) | |
4 | 1, 2, 3 | mp2an 708 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) ↔ {𝐴, 𝐵} ⊆ 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 196 ∧ wa 384 ∈ wcel 1990 Vcvv 3200 ⊆ wss 3574 {cpr 4179 |
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-3an 1039 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-un 3579 df-in 3581 df-ss 3588 df-sn 4178 df-pr 4180 |
This theorem is referenced by: tpss 4368 uniintsn 4514 pwssun 5020 xpsspw 5233 dffv2 6271 fpr2g 6475 fiint 8237 wunex2 9560 hashfun 13224 fun2dmnop0 13276 prdsle 16122 prdsless 16123 prdsleval 16137 pwsle 16152 acsfn2 16324 joinfval 17001 joindmss 17007 meetfval 17015 meetdmss 17021 clatl 17116 ipoval 17154 ipolerval 17156 eqgfval 17642 eqgval 17643 gaorb 17740 pmtrrn2 17880 efgcpbllema 18167 frgpuplem 18185 drngnidl 19229 drnglpir 19253 isnzr2hash 19264 ltbval 19471 ltbwe 19472 opsrle 19475 opsrtoslem1 19484 thlle 20041 isphtpc 22793 axlowdimlem4 25825 structgrssvtx 25913 structgrssiedg 25914 structgrssvtxlemOLD 25915 structgrssvtxOLD 25916 structgrssiedgOLD 25917 umgredg 26033 wlk1walk 26535 wlkonl1iedg 26561 wlkdlem2 26580 3wlkdlem6 27025 frcond2 27131 frcond3 27133 nfrgr2v 27136 frgr3vlem1 27137 frgr3vlem2 27138 2pthfrgrrn 27146 frgrncvvdeqlem2 27164 shincli 28221 chincli 28319 coinfliprv 30544 altxpsspw 32084 fourierdlem103 40426 fourierdlem104 40427 nnsum3primes4 41676 |
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