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Description: Distributive law for conjunction. Theorem *4.4 of [WhiteheadRussell] p. 118. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 5-Jan-2013.) |
Ref | Expression |
---|---|
andi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orc 712 |
. . 3
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2 | olc 711 |
. . 3
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3 | 1, 2 | jaodan 797 |
. 2
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4 | orc 712 |
. . . 4
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5 | 4 | anim2i 342 |
. . 3
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6 | olc 711 |
. . . 4
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7 | 6 | anim2i 342 |
. . 3
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8 | 5, 7 | jaoi 716 |
. 2
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9 | 3, 8 | impbii 126 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 709 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: andir 819 anddi 821 dcim 841 dcan 933 excxor 1378 sbequilem 1838 sborv 1890 r19.43 2635 indi 3383 difindiss 3390 unrab 3407 unipr 3824 uniun 3829 unopab 4083 xpundi 4683 coundir 5132 unpreima 5642 tpostpos 6265 elni2 7313 elznn0nn 9267 |
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