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Proofgold Asset

asset id
aa72277f1d5aa4930f8933d00c4ec718fd71a1640c4bd386b75eeb8d1514efa1
asset hash
1a6c596372e583a9bc8983bdcbbe1d07ecdac11f73748cd93c62e303d3d87284
bday / block
36870
tx
2a1c4..
preasset
doc published by Pr4zB..
Param 4402e.. : ι(ιιο) → ο
Param cf2df.. : ι(ιιο) → ο
Definition SubqSubq := λ x0 x1 . ∀ x2 . x2x0x2x1
Param setminussetminus : ιιι
Param SingSing : ιι
Definition FalseFalse := ∀ x0 : ο . x0
Definition notnot := λ x0 : ο . x0False
Definition 8b6ad.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 . ∀ x5 : ο . ((x1 = x2∀ x6 : ο . x6)(x1 = x3∀ x6 : ο . x6)(x2 = x3∀ x6 : ο . x6)(x1 = x4∀ x6 : ο . x6)(x2 = x4∀ x6 : ο . x6)(x3 = x4∀ x6 : ο . x6)not (x0 x1 x2)not (x0 x1 x3)not (x0 x2 x3)not (x0 x1 x4)not (x0 x2 x4)not (x0 x3 x4)x5)x5
Definition c5756.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 . ∀ x6 : ο . (8b6ad.. x0 x1 x2 x3 x4(x1 = x5∀ x7 : ο . x7)(x2 = x5∀ x7 : ο . x7)(x3 = x5∀ x7 : ο . x7)(x4 = x5∀ x7 : ο . x7)not (x0 x1 x5)not (x0 x2 x5)x0 x3 x5x0 x4 x5x6)x6
Definition 2de86.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 . ∀ x7 : ο . (c5756.. x0 x1 x2 x3 x4 x5(x1 = x6∀ x8 : ο . x8)(x2 = x6∀ x8 : ο . x8)(x3 = x6∀ x8 : ο . x8)(x4 = x6∀ x8 : ο . x8)(x5 = x6∀ x8 : ο . x8)not (x0 x1 x6)x0 x2 x6not (x0 x3 x6)x0 x4 x6not (x0 x5 x6)x7)x7
Definition 02f3e.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 . ∀ x8 : ο . (2de86.. x0 x1 x2 x3 x4 x5 x6(x1 = x7∀ x9 : ο . x9)(x2 = x7∀ x9 : ο . x9)(x3 = x7∀ x9 : ο . x9)(x4 = x7∀ x9 : ο . x9)(x5 = x7∀ x9 : ο . x9)(x6 = x7∀ x9 : ο . x9)x0 x1 x7x0 x2 x7x0 x3 x7x0 x4 x7not (x0 x5 x7)not (x0 x6 x7)x8)x8
Definition a5c5d.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 . ∀ x9 : ο . (02f3e.. x0 x1 x2 x3 x4 x5 x6 x7(x1 = x8∀ x10 : ο . x10)(x2 = x8∀ x10 : ο . x10)(x3 = x8∀ x10 : ο . x10)(x4 = x8∀ x10 : ο . x10)(x5 = x8∀ x10 : ο . x10)(x6 = x8∀ x10 : ο . x10)(x7 = x8∀ x10 : ο . x10)not (x0 x1 x8)not (x0 x2 x8)not (x0 x3 x8)x0 x4 x8not (x0 x5 x8)not (x0 x6 x8)not (x0 x7 x8)x9)x9
Definition b0749.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 . ∀ x10 : ο . (a5c5d.. x0 x1 x2 x3 x4 x5 x6 x7 x8(x1 = x9∀ x11 : ο . x11)(x2 = x9∀ x11 : ο . x11)(x3 = x9∀ x11 : ο . x11)(x4 = x9∀ x11 : ο . x11)(x5 = x9∀ x11 : ο . x11)(x6 = x9∀ x11 : ο . x11)(x7 = x9∀ x11 : ο . x11)(x8 = x9∀ x11 : ο . x11)x0 x1 x9not (x0 x2 x9)x0 x3 x9not (x0 x4 x9)not (x0 x5 x9)x0 x6 x9not (x0 x7 x9)x0 x8 x9x10)x10
Definition f1c88.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 . ∀ x11 : ο . (b0749.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9(x1 = x10∀ x12 : ο . x12)(x2 = x10∀ x12 : ο . x12)(x3 = x10∀ x12 : ο . x12)(x4 = x10∀ x12 : ο . x12)(x5 = x10∀ x12 : ο . x12)(x6 = x10∀ x12 : ο . x12)(x7 = x10∀ x12 : ο . x12)(x8 = x10∀ x12 : ο . x12)(x9 = x10∀ x12 : ο . x12)x0 x1 x10x0 x2 x10not (x0 x3 x10)not (x0 x4 x10)x0 x5 x10not (x0 x6 x10)not (x0 x7 x10)x0 x8 x10not (x0 x9 x10)x11)x11
Definition c1824.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 . ∀ x12 : ο . (f1c88.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10(x1 = x11∀ x13 : ο . x13)(x2 = x11∀ x13 : ο . x13)(x3 = x11∀ x13 : ο . x13)(x4 = x11∀ x13 : ο . x13)(x5 = x11∀ x13 : ο . x13)(x6 = x11∀ x13 : ο . x13)(x7 = x11∀ x13 : ο . x13)(x8 = x11∀ x13 : ο . x13)(x9 = x11∀ x13 : ο . x13)(x10 = x11∀ x13 : ο . x13)not (x0 x1 x11)not (x0 x2 x11)x0 x3 x11not (x0 x4 x11)not (x0 x5 x11)not (x0 x6 x11)not (x0 x7 x11)x0 x8 x11not (x0 x9 x11)not (x0 x10 x11)x12)x12
Definition c8b10.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 . ∀ x9 : ο . (02f3e.. x0 x1 x2 x3 x4 x5 x6 x7(x1 = x8∀ x10 : ο . x10)(x2 = x8∀ x10 : ο . x10)(x3 = x8∀ x10 : ο . x10)(x4 = x8∀ x10 : ο . x10)(x5 = x8∀ x10 : ο . x10)(x6 = x8∀ x10 : ο . x10)(x7 = x8∀ x10 : ο . x10)x0 x1 x8not (x0 x2 x8)not (x0 x3 x8)x0 x4 x8not (x0 x5 x8)not (x0 x6 x8)not (x0 x7 x8)x9)x9
Definition 7db3a.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 . ∀ x10 : ο . (c8b10.. x0 x1 x2 x3 x4 x5 x6 x7 x8(x1 = x9∀ x11 : ο . x11)(x2 = x9∀ x11 : ο . x11)(x3 = x9∀ x11 : ο . x11)(x4 = x9∀ x11 : ο . x11)(x5 = x9∀ x11 : ο . x11)(x6 = x9∀ x11 : ο . x11)(x7 = x9∀ x11 : ο . x11)(x8 = x9∀ x11 : ο . x11)not (x0 x1 x9)not (x0 x2 x9)x0 x3 x9not (x0 x4 x9)not (x0 x5 x9)x0 x6 x9not (x0 x7 x9)x0 x8 x9x10)x10
Definition 60dbb.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 . ∀ x11 : ο . (7db3a.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9(x1 = x10∀ x12 : ο . x12)(x2 = x10∀ x12 : ο . x12)(x3 = x10∀ x12 : ο . x12)(x4 = x10∀ x12 : ο . x12)(x5 = x10∀ x12 : ο . x12)(x6 = x10∀ x12 : ο . x12)(x7 = x10∀ x12 : ο . x12)(x8 = x10∀ x12 : ο . x12)(x9 = x10∀ x12 : ο . x12)not (x0 x1 x10)x0 x2 x10not (x0 x3 x10)not (x0 x4 x10)x0 x5 x10not (x0 x6 x10)not (x0 x7 x10)x0 x8 x10not (x0 x9 x10)x11)x11
Definition 59ef4.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 . ∀ x12 : ο . (60dbb.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10(x1 = x11∀ x13 : ο . x13)(x2 = x11∀ x13 : ο . x13)(x3 = x11∀ x13 : ο . x13)(x4 = x11∀ x13 : ο . x13)(x5 = x11∀ x13 : ο . x13)(x6 = x11∀ x13 : ο . x13)(x7 = x11∀ x13 : ο . x13)(x8 = x11∀ x13 : ο . x13)(x9 = x11∀ x13 : ο . x13)(x10 = x11∀ x13 : ο . x13)x0 x1 x11not (x0 x2 x11)not (x0 x3 x11)not (x0 x4 x11)not (x0 x5 x11)x0 x6 x11not (x0 x7 x11)not (x0 x8 x11)not (x0 x9 x11)x0 x10 x11x12)x12
Definition 9f2b5.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 . ∀ x13 : ο . (59ef4.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11(x1 = x12∀ x14 : ο . x14)(x2 = x12∀ x14 : ο . x14)(x3 = x12∀ x14 : ο . x14)(x4 = x12∀ x14 : ο . x14)(x5 = x12∀ x14 : ο . x14)(x6 = x12∀ x14 : ο . x14)(x7 = x12∀ x14 : ο . x14)(x8 = x12∀ x14 : ο . x14)(x9 = x12∀ x14 : ο . x14)(x10 = x12∀ x14 : ο . x14)(x11 = x12∀ x14 : ο . x14)x0 x1 x12x0 x2 x12not (x0 x3 x12)not (x0 x4 x12)x0 x5 x12not (x0 x6 x12)not (x0 x7 x12)not (x0 x8 x12)not (x0 x9 x12)not (x0 x10 x12)not (x0 x11 x12)x13)x13
Definition 79b8d.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 . ∀ x13 : ο . (c1824.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11(x1 = x12∀ x14 : ο . x14)(x2 = x12∀ x14 : ο . x14)(x3 = x12∀ x14 : ο . x14)(x4 = x12∀ x14 : ο . x14)(x5 = x12∀ x14 : ο . x14)(x6 = x12∀ x14 : ο . x14)(x7 = x12∀ x14 : ο . x14)(x8 = x12∀ x14 : ο . x14)(x9 = x12∀ x14 : ο . x14)(x10 = x12∀ x14 : ο . x14)(x11 = x12∀ x14 : ο . x14)x0 x1 x12not (x0 x2 x12)not (x0 x3 x12)not (x0 x4 x12)x0 x5 x12not (x0 x6 x12)not (x0 x7 x12)not (x0 x8 x12)not (x0 x9 x12)not (x0 x10 x12)x0 x11 x12x13)x13
Definition df3c6.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 . ∀ x12 : ο . (f1c88.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10(x1 = x11∀ x13 : ο . x13)(x2 = x11∀ x13 : ο . x13)(x3 = x11∀ x13 : ο . x13)(x4 = x11∀ x13 : ο . x13)(x5 = x11∀ x13 : ο . x13)(x6 = x11∀ x13 : ο . x13)(x7 = x11∀ x13 : ο . x13)(x8 = x11∀ x13 : ο . x13)(x9 = x11∀ x13 : ο . x13)(x10 = x11∀ x13 : ο . x13)not (x0 x1 x11)x0 x2 x11x0 x3 x11not (x0 x4 x11)not (x0 x5 x11)not (x0 x6 x11)not (x0 x7 x11)x0 x8 x11not (x0 x9 x11)not (x0 x10 x11)x12)x12
Definition 2e358.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 . ∀ x13 : ο . (df3c6.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11(x1 = x12∀ x14 : ο . x14)(x2 = x12∀ x14 : ο . x14)(x3 = x12∀ x14 : ο . x14)(x4 = x12∀ x14 : ο . x14)(x5 = x12∀ x14 : ο . x14)(x6 = x12∀ x14 : ο . x14)(x7 = x12∀ x14 : ο . x14)(x8 = x12∀ x14 : ο . x14)(x9 = x12∀ x14 : ο . x14)(x10 = x12∀ x14 : ο . x14)(x11 = x12∀ x14 : ο . x14)x0 x1 x12not (x0 x2 x12)not (x0 x3 x12)not (x0 x4 x12)not (x0 x5 x12)x0 x6 x12not (x0 x7 x12)not (x0 x8 x12)not (x0 x9 x12)not (x0 x10 x12)x0 x11 x12x13)x13
Definition f8709.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 . ∀ x7 : ο . (c5756.. x0 x1 x2 x3 x4 x5(x1 = x6∀ x8 : ο . x8)(x2 = x6∀ x8 : ο . x8)(x3 = x6∀ x8 : ο . x8)(x4 = x6∀ x8 : ο . x8)(x5 = x6∀ x8 : ο . x8)not (x0 x1 x6)x0 x2 x6x0 x3 x6x0 x4 x6not (x0 x5 x6)x7)x7
Definition 16c0f.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 . ∀ x8 : ο . (f8709.. x0 x1 x2 x3 x4 x5 x6(x1 = x7∀ x9 : ο . x9)(x2 = x7∀ x9 : ο . x9)(x3 = x7∀ x9 : ο . x9)(x4 = x7∀ x9 : ο . x9)(x5 = x7∀ x9 : ο . x9)(x6 = x7∀ x9 : ο . x9)x0 x1 x7x0 x2 x7not (x0 x3 x7)x0 x4 x7not (x0 x5 x7)not (x0 x6 x7)x8)x8
Definition 00e1f.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 . ∀ x9 : ο . (16c0f.. x0 x1 x2 x3 x4 x5 x6 x7(x1 = x8∀ x10 : ο . x10)(x2 = x8∀ x10 : ο . x10)(x3 = x8∀ x10 : ο . x10)(x4 = x8∀ x10 : ο . x10)(x5 = x8∀ x10 : ο . x10)(x6 = x8∀ x10 : ο . x10)(x7 = x8∀ x10 : ο . x10)not (x0 x1 x8)not (x0 x2 x8)not (x0 x3 x8)x0 x4 x8not (x0 x5 x8)not (x0 x6 x8)not (x0 x7 x8)x9)x9
Definition ed012.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 . ∀ x10 : ο . (00e1f.. x0 x1 x2 x3 x4 x5 x6 x7 x8(x1 = x9∀ x11 : ο . x11)(x2 = x9∀ x11 : ο . x11)(x3 = x9∀ x11 : ο . x11)(x4 = x9∀ x11 : ο . x11)(x5 = x9∀ x11 : ο . x11)(x6 = x9∀ x11 : ο . x11)(x7 = x9∀ x11 : ο . x11)(x8 = x9∀ x11 : ο . x11)x0 x1 x9not (x0 x2 x9)not (x0 x3 x9)not (x0 x4 x9)x0 x5 x9x0 x6 x9not (x0 x7 x9)x0 x8 x9x10)x10
Definition 4f588.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 . ∀ x11 : ο . (ed012.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9(x1 = x10∀ x12 : ο . x12)(x2 = x10∀ x12 : ο . x12)(x3 = x10∀ x12 : ο . x12)(x4 = x10∀ x12 : ο . x12)(x5 = x10∀ x12 : ο . x12)(x6 = x10∀ x12 : ο . x12)(x7 = x10∀ x12 : ο . x12)(x8 = x10∀ x12 : ο . x12)(x9 = x10∀ x12 : ο . x12)x0 x1 x10x0 x2 x10x0 x3 x10not (x0 x4 x10)not (x0 x5 x10)not (x0 x6 x10)not (x0 x7 x10)x0 x8 x10not (x0 x9 x10)x11)x11
Definition d17b7.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 . ∀ x12 : ο . (4f588.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10(x1 = x11∀ x13 : ο . x13)(x2 = x11∀ x13 : ο . x13)(x3 = x11∀ x13 : ο . x13)(x4 = x11∀ x13 : ο . x13)(x5 = x11∀ x13 : ο . x13)(x6 = x11∀ x13 : ο . x13)(x7 = x11∀ x13 : ο . x13)(x8 = x11∀ x13 : ο . x13)(x9 = x11∀ x13 : ο . x13)(x10 = x11∀ x13 : ο . x13)not (x0 x1 x11)x0 x2 x11not (x0 x3 x11)not (x0 x4 x11)x0 x5 x11not (x0 x6 x11)not (x0 x7 x11)not (x0 x8 x11)not (x0 x9 x11)not (x0 x10 x11)x12)x12
Definition 43d0f.. := λ x0 : ι → ι → ο . λ x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 . ∀ x13 : ο . (d17b7.. x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11(x1 = x12∀ x14 : ο . x14)(x2 = x12∀ x14 : ο . x14)(x3 = x12∀ x14 : ο . x14)(x4 = x12∀ x14 : ο . x14)(x5 = x12∀ x14 : ο . x14)(x6 = x12∀ x14 : ο . x14)(x7 = x12∀ x14 : ο . x14)(x8 = x12∀ x14 : ο . x14)(x9 = x12∀ x14 : ο . x14)(x10 = x12∀ x14 : ο . x14)(x11 = x12∀ x14 : ο . x14)not (x0 x1 x12)not (x0 x2 x12)x0 x3 x12not (x0 x4 x12)not (x0 x5 x12)not (x0 x6 x12)x0 x7 x12x0 x8 x12not (x0 x9 x12)not (x0 x10 x12)x0 x11 x12x13)x13
Definition andand := λ x0 x1 : ο . ∀ x2 : ο . (x0x1x2)x2
Definition nInnIn := λ x0 x1 . not (x0x1)
Known setminusEsetminusE : ∀ x0 x1 x2 . x2setminus x0 x1and (x2x0) (nIn x2 x1)
Known 3afa9.. : ∀ x0 x1 . ∀ x2 : ι → ι → ο . (∀ x3 . x3x1∀ x4 . x4x1x2 x3 x4x2 x4 x3)4402e.. x1 x2cf2df.. x1 x2∀ x3 . x3x1x0setminus x1 (Sing x3)∀ x4 . x4x0∀ x5 . x5x0∀ x6 . x6x0∀ x7 . x7x0∀ x8 . x8x0∀ x9 . x9x0∀ x10 . x10x0∀ x11 . x11x0∀ x12 . x12x0∀ x13 . x13x0∀ x14 . x14x0c1824.. x2 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14∀ x15 : ο . (x2 x4 x3not (x2 x5 x3)not (x2 x6 x3)not (x2 x7 x3)x2 x8 x3not (x2 x9 x3)not (x2 x10 x3)not (x2 x11 x3)not (x2 x12 x3)not (x2 x13 x3)x2 x14 x3x15)(x2 x4 x3x2 x5 x3not (x2 x6 x3)not (x2 x7 x3)x2 x8 x3not (x2 x9 x3)not (x2 x10 x3)not (x2 x11 x3)not (x2 x12 x3)not (x2 x13 x3)x2 x14 x3x15)(x2 x4 x3not (x2 x5 x3)not (x2 x6 x3)not (x2 x7 x3)not (x2 x8 x3)x2 x9 x3not (x2 x10 x3)not (x2 x11 x3)not (x2 x12 x3)not (x2 x13 x3)x2 x14 x3x15)(x2 x4 x3not (x2 x5 x3)not (x2 x6 x3)not (x2 x7 x3)x2 x8 x3x2 x9 x3not (x2 x10 x3)not (x2 x11 x3)not (x2 x12 x3)not (x2 x13 x3)x2 x14 x3x15)x15
Known neq_i_symneq_i_sym : ∀ x0 x1 . (x0 = x1∀ x2 : ο . x2)x1 = x0∀ x2 : ο . x2
Known Subq_traSubq_tra : ∀ x0 x1 x2 . x0x1x1x2x0x2
Known setminus_Subqsetminus_Subq : ∀ x0 x1 . setminus x0 x1x0
Known SingISingI : ∀ x0 . x0Sing x0
Theorem 593cf.. : ∀ x0 x1 . ∀ x2 : ι → ι → ο . (∀ x3 . x3x1∀ x4 . x4x1x2 x3 x4x2 x4 x3)4402e.. x1 x2cf2df.. x1 x2∀ x3 . x3x1x0setminus x1 (Sing x3)∀ x4 . x4x0∀ x5 . x5x0∀ x6 . x6x0∀ x7 . x7x0∀ x8 . x8x0∀ x9 . x9x0∀ x10 . x10x0∀ x11 . x11x0∀ x12 . x12x0∀ x13 . x13x0∀ x14 . x14x0c1824.. x2 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14∀ x15 : ο . (∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0∀ x21 . x21x0∀ x22 . x22x0∀ x23 . x23x0∀ x24 . x24x0∀ x25 . x25x0∀ x26 . x26x09f2b5.. x2 x16 x17 x3 x18 x19 x20 x21 x22 x23 x24 x25 x26x15)(∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0∀ x21 . x21x0∀ x22 . x22x0∀ x23 . x23x0∀ x24 . x24x0∀ x25 . x25x0∀ x26 . x26x079b8d.. x2 x16 x17 x18 x19 x20 x21 x22 x23 x24 x25 x26 x3x15)(∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0∀ x21 . x21x0∀ x22 . x22x0∀ x23 . x23x0∀ x24 . x24x0∀ x25 . x25x0∀ x26 . x26x02e358.. x2 x16 x17 x18 x19 x20 x21 x22 x23 x24 x3 x25 x26x15)(∀ x16 . x16x0∀ x17 . x17x0∀ x18 . x18x0∀ x19 . x19x0∀ x20 . x20x0∀ x21 . x21x0∀ x22 . x22x0∀ x23 . x23x0∀ x24 . x24x0∀ x25 . x25x0∀ x26 . x26x043d0f.. x2 x16 x17 x18 x19 x3 x20 x21 x22 x23 x24 x25 x26x15)x15 (proof)