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Mirrors > Home > MPE Home > Th. List > snidg | Structured version Visualization version GIF version |
Description: A set is a member of its singleton. Part of Theorem 7.6 of [Quine] p. 49. (Contributed by NM, 28-Oct-2003.) |
Ref | Expression |
---|---|
snidg | ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ {𝐴}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2610 | . 2 ⊢ 𝐴 = 𝐴 | |
2 | elsng 4139 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ {𝐴} ↔ 𝐴 = 𝐴)) | |
3 | 1, 2 | mpbiri 247 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ {𝐴}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1475 ∈ wcel 1977 {csn 4125 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-sn 4126 |
This theorem is referenced by: snidb 4154 elsn2g 4157 snnzg 4251 sneqrg 4310 eldmressnsn 5359 elsnxp 5594 elsnxpOLD 5595 fvressn 6334 fsnunfv 6358 1stconst 7152 2ndconst 7153 curry1 7156 curry2 7159 suppsnop 7196 en1uniel 7914 unifpw 8152 sucprcreg 8389 cfsuc 8962 elfzomin 12406 hashrabsn1 13024 swrds1 13303 lcmfunsnlem1 15188 ramub1lem1 15568 acsfiindd 17000 mgm1 17080 mnd1id 17155 odf1o1 17810 gsumconst 18157 lspsolv 18964 mat1ghm 20108 mat1mhm 20109 mavmul0 20177 m1detdiag 20222 mdetrlin 20227 mdetrsca 20228 chpmat1dlem 20459 maxlp 20761 cnpdis 20907 concompid 21044 dislly 21110 locfindis 21143 dfac14lem 21230 txtube 21253 pt1hmeo 21419 ufileu 21533 filufint 21534 uffix 21535 uffixsn 21539 i1fima2sn 23253 ply1rem 23727 1conngra 26203 vdgr1d 26430 vdgr1a 26433 eupap1 26503 esumel 29436 derangsn 30406 erdszelem4 30430 cvmlift2lem9 30547 fv1stcnv 30925 fv2ndcnv 30926 neibastop2lem 31525 bj-sels 32143 ismrer1 32807 elpaddatriN 34107 kelac2 36653 rngunsnply 36762 brtrclfv2 37038 k0004lem3 37467 projf1o 38381 mapsnd 38383 fsneq 38393 fsneqrn 38398 unirnmapsn 38401 ssmapsn 38403 mccllem 38664 limcresiooub 38709 limcresioolb 38710 cnfdmsn 38767 cxpcncf2 38786 dvmptfprodlem 38834 dvnprodlem1 38836 dvnprodlem2 38837 dvnprodlem3 38838 fourierdlem49 39048 prsal 39214 salexct 39228 salgencntex 39237 sge0sn 39272 sge0snmpt 39276 sge0snmptf 39330 caratheodorylem1 39416 hoiprodp1 39478 hoidmv1le 39484 hoidmvlelem1 39485 hoidmvlelem2 39486 hoidmvlelem3 39487 hoidmvlelem4 39488 hspmbllem2 39517 ovnovollem1 39546 ovnovollem2 39547 funressnfv 39857 el1fzopredsuc 39948 vtxd0nedgb 40703 1loopgrvd2 40718 1wlkp1 40890 11wlkdlem2 41305 1conngr 41361 snlindsntor 42054 lmod1lem1 42070 lmod1lem2 42071 lmod1lem3 42072 lmod1lem4 42073 lmod1lem5 42074 lmod1zr 42076 |
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