Description: The infinitesimal relation for a structure W . (Contributed by Thierry Arnoux, 30-Jan-2018)
Ref | Expression | ||
---|---|---|---|
Hypothesis | inftm.b | |
|
Assertion | inftmrel | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inftm.b | |
|
2 | elex | |
|
3 | fveq2 | |
|
4 | 3 1 | eqtr4di | |
5 | 4 | eleq2d | |
6 | 4 | eleq2d | |
7 | 5 6 | anbi12d | |
8 | fveq2 | |
|
9 | fveq2 | |
|
10 | eqidd | |
|
11 | 8 9 10 | breq123d | |
12 | fveq2 | |
|
13 | 12 | oveqd | |
14 | eqidd | |
|
15 | 13 9 14 | breq123d | |
16 | 15 | ralbidv | |
17 | 11 16 | anbi12d | |
18 | 7 17 | anbi12d | |
19 | 18 | opabbidv | |
20 | df-inftm | |
|
21 | 1 | fvexi | |
22 | 21 21 | xpex | |
23 | opabssxp | |
|
24 | 22 23 | ssexi | |
25 | 19 20 24 | fvmpt | |
26 | 2 25 | syl | |
27 | 26 23 | eqsstrdi | |