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Mirrors > Home > ILE Home > Th. List > df-stab | Unicode version |
Description: Propositions where a
double-negative can be removed are called stable.
See Chapter 2 [Moschovakis] p. 2.
Our notation for stability is a connective STAB which we
place before
the formula in question. For example, STAB (Contributed by David A. Wheeler, 13-Aug-2018.) |
Ref | Expression |
---|---|
df-stab |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wph |
. . 3
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2 | 1 | wstab 816 |
. 2
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3 | 1 | wn 3 |
. . . 4
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4 | 3 | wn 3 |
. . 3
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5 | 4, 1 | wi 4 |
. 2
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6 | 2, 5 | wb 104 |
1
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Colors of variables: wff set class |
This definition is referenced by: stbid 818 stabnot 819 dcstab 830 stdcndc 831 stdcndcOLD 832 stdcn 833 const 838 imanst 874 ddifstab 3213 cnstab 8431 bj-trst 13122 bj-fast 13123 bj-nnbist 13124 bj-stim 13125 bj-stan 13126 bj-stand 13127 bj-stal 13128 bj-pm2.18st 13129 bdstab 13196 exmid1stab 13368 subctctexmid 13369 |
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