Description: The range of a subword is a subset of the range of that word. Stronger version of swrdrn . (Contributed by Thierry Arnoux, 12-Dec-2023)
Ref | Expression | ||
---|---|---|---|
Assertion | swrdrn2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | swrdval2 | |
|
2 | 1 | rneqd | |
3 | eqidd | |
|
4 | simpl1 | |
|
5 | 3 4 | wrdfd | |
6 | 5 | ffund | |
7 | elfzuz3 | |
|
8 | 7 | 3ad2ant3 | |
9 | 8 | adantr | |
10 | fzoss2 | |
|
11 | 9 10 | syl | |
12 | elfzuz | |
|
13 | 12 | 3ad2ant2 | |
14 | 13 | adantr | |
15 | fzoss1 | |
|
16 | 14 15 | syl | |
17 | simpr | |
|
18 | simpl3 | |
|
19 | 18 | elfzelzd | |
20 | simpl2 | |
|
21 | 20 | elfzelzd | |
22 | fzoaddel2 | |
|
23 | 17 19 21 22 | syl3anc | |
24 | 16 23 | sseldd | |
25 | 11 24 | sseldd | |
26 | wrddm | |
|
27 | 26 | 3ad2ant1 | |
28 | 27 | adantr | |
29 | 25 28 | eleqtrrd | |
30 | fvelrn | |
|
31 | 6 29 30 | syl2anc | |
32 | 31 | ralrimiva | |
33 | eqid | |
|
34 | 33 | rnmptss | |
35 | 32 34 | syl | |
36 | 2 35 | eqsstrd | |