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Mirrors > Home > ILE Home > Th. List > ax-17 | GIF version |
Description: Axiom to quantify a
variable over a formula in which it does not occur.
Axiom C5 in [Megill] p. 444 (p. 11 of the
preprint). Also appears as
Axiom B6 (p. 75) of system S2 of [Tarski]
p. 77 and Axiom C5-1 of
[Monk2] p. 113.
(Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
ax-17 | ⊢ (𝜑 → ∀𝑥𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wph | . 2 wff 𝜑 | |
2 | vx | . . 3 setvar 𝑥 | |
3 | 1, 2 | wal 1330 | . 2 wff ∀𝑥𝜑 |
4 | 1, 3 | wi 4 | 1 wff (𝜑 → ∀𝑥𝜑) |
Colors of variables: wff set class |
This axiom is referenced by: a17d 1508 nfv 1509 exlimiv 1578 equid 1678 ax16 1786 dvelimfALT2 1790 exlimdv 1792 ax11a2 1794 albidv 1797 exbidv 1798 ax11v 1800 ax11ev 1801 ax16i 1831 ax16ALT 1832 equvin 1836 19.9v 1844 19.21v 1846 alrimiv 1847 alrimdv 1849 alimdv 1852 eximdv 1853 19.23v 1856 pm11.53 1868 19.27v 1872 19.28v 1873 19.41v 1875 19.42v 1879 cbvalv 1890 cbvexv 1891 cbvexdh 1899 nexdv 1909 cleljust 1911 sbhb 1914 hbsbv 1915 sbco2vh 1919 nfsb 1920 equsb3lem 1924 equsb3 1925 sbn 1926 sbim 1927 sbor 1928 sban 1929 sbco3 1948 nfsbt 1950 elsb3 1952 elsb4 1953 sb9 1955 sbcom2v2 1962 sbcom2 1963 dfsb7 1967 sbid2v 1972 sbelx 1973 sbal 1976 sbal1 1978 sbex 1980 exsb 1984 dvelimALT 1986 dvelim 1993 dvelimor 1994 dveel1 1996 dveel2 1997 euf 2005 sb8euh 2023 euorv 2027 euex 2030 euanv 2057 mo4f 2060 moim 2064 moimv 2066 moanim 2074 mopick 2078 2eu4 2093 cleqh 2240 abeq2 2249 mpteq12 4019 bj-ex 13140 bj-inex 13276 |
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