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Theorem avril1 20666
 Description: Poisson d'Avril's Theorem. This theorem is noted for its Selbstdokumentieren property, which means, literally, "self-documenting" and recalls the principle of quidquid germanus dictum sit, altum viditur, often used in set theory. Starting with the seemingly simple yet profound fact that any object equals itself (proved by Tarski in 1965; see Lemma 6 of [Tarski] p. 68), we demonstrate that the power set of the real numbers, as a relation on the value of the imaginary unit, does not conjoin with an empty relation on the product of the additive and multiplicative identity elements, leading to this startling conclusion that has left even seasoned professional mathematicians scratching their heads. (Contributed by Prof. Loof Lirpa, 1-Apr-2005.) (Proof modification is discouraged.) (New usage is discouraged.) A reply to skeptics can be found at http://us.metamath.org/mpegif/mmnotes.txt, under the 1-Apr-2006 entry.
Assertion
Ref Expression
avril1

Proof of Theorem avril1
StepHypRef Expression
1 equid 1818 . . . . . . . 8
2 dfnul2 3364 . . . . . . . . . 10
32abeq2i 2356 . . . . . . . . 9
43con2bii 324 . . . . . . . 8
51, 4mpbi 201 . . . . . . 7
6 eleq1 2313 . . . . . . 7
75, 6mtbii 295 . . . . . 6
87vtocleg 2792 . . . . 5
9 elex 2735 . . . . . 6
109con3i 129 . . . . 5
118, 10pm2.61i 158 . . . 4
12 df-br 3921 . . . . 5
13 0cn 8711 . . . . . . . 8
1413mulid1i 8719 . . . . . . 7
1514opeq2i 3700 . . . . . 6
1615eleq1i 2316 . . . . 5
1712, 16bitri 242 . . . 4
1811, 17mtbir 292 . . 3
1918intnan 885 . 2
20 df-i 8626 . . . . . . . 8
2120fveq1i 5378 . . . . . . 7
22 df-fv 4608 . . . . . . 7
2321, 22eqtri 2273 . . . . . 6
2423breq2i 3928 . . . . 5
25 df-r 8627 . . . . . . 7
26 sseq2 3121 . . . . . . . . 9
2726abbidv 2363 . . . . . . . 8
28 df-pw 3532 . . . . . . . 8
29 df-pw 3532 . . . . . . . 8
3027, 28, 293eqtr4g 2310 . . . . . . 7
3125, 30ax-mp 10 . . . . . 6
3231breqi 3926 . . . . 5
3324, 32bitri 242 . . . 4
3433anbi1i 679 . . 3
3534notbii 289 . 2
3619, 35mpbir 202 1
 Colors of variables: wff set class Syntax hints:   wn 5   wa 360   wceq 1619   wcel 1621  cab 2239  cvv 2727   wss 3078  c0 3362  cpw 3530  csn 3544  cop 3547  cuni 3727   class class class wbr 3920   cxp 4578  cima 4583  cfv 4592  (class class class)co 5710  cnr 8369  c0r 8370  c1r 8371  cr 8616  cc0 8617  c1 8618  ci 8619   cmul 8622 This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-5 1533  ax-6 1534  ax-7 1535  ax-gen 1536  ax-8 1623  ax-11 1624  ax-17 1628  ax-12o 1664  ax-10 1678  ax-9 1684  ax-4 1692  ax-16 1926  ax-ext 2234  ax-resscn 8674  ax-1cn 8675  ax-icn 8676  ax-addcl 8677  ax-mulcl 8679  ax-mulcom 8681  ax-mulass 8683  ax-distr 8684  ax-i2m1 8685  ax-1rid 8687  ax-cnre 8690 This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3an 941  df-tru 1315  df-ex 1538  df-nf 1540  df-sb 1883  df-clab 2240  df-cleq 2246  df-clel 2249  df-nfc 2374  df-ral 2513  df-rex 2514  df-rab 2516  df-v 2729  df-dif 3081  df-un 3083  df-in 3085  df-ss 3089  df-nul 3363  df-if 3471  df-pw 3532  df-sn 3550  df-pr 3551  df-op 3553  df-uni 3728  df-br 3921  df-opab 3975  df-xp 4594  df-cnv 4596  df-dm 4598  df-rn 4599  df-res 4600  df-ima 4601  df-fv 4608  df-ov 5713  df-i 8626  df-r 8627
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