Theorem iccssre 10163

Description: A closed real interval is a set of reals. (Contributed by FL, 6-Jun-2007.) (Proof shortened by Paul Chapman, 21-Jan-2008.)

Assertion

Ref	Expression
iccssre	|- ( ( A e. RR /\ B e. RR ) -> ( A [,] B ) C_ RR )

Proof of Theorem iccssre

Dummy variable x is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elicc2 10146	. . . . 5 |- ( ( A e. RR /\ B e. RR ) -> ( x e. ( A [,] B ) <-> ( x e. RR /\ A <_ x /\ x <_ B ) ) )
2	1	biimp3a 1379	. . . 4 |- ( ( A e. RR /\ B e. RR /\ x e. ( A [,] B ) ) -> ( x e. RR /\ A <_ x /\ x <_ B ) )
3	2	simp1d 1033	. . 3 |- ( ( A e. RR /\ B e. RR /\ x e. ( A [,] B ) ) -> x e. RR )
4	3	3expia 1229	. 2 |- ( ( A e. RR /\ B e. RR ) -> ( x e. ( A [,] B ) -> x e. RR ) )
5	4	ssrdv 3230	1 |- ( ( A e. RR /\ B e. RR ) -> ( A [,] B ) C_ RR )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1002   e. wcel 2200   C_ wss 3197   class class class wbr 4083  (class class class)co 6007   RRcr 8009   <_ cle 8193   [,]cicc 10099

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-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8101  ax-resscn 8102  ax-pre-ltirr 8122  ax-pre-ltwlin 8123  ax-pre-lttrn 8124

This theorem depends on definitions:  df-bi 117  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-id 4384  df-po 4387  df-iso 4388  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-iota 5278  df-fun 5320  df-fv 5326  df-ov 6010  df-oprab 6011  df-mpo 6012  df-pnf 8194  df-mnf 8195  df-xr 8196  df-ltxr 8197  df-le 8198  df-icc 10103

This theorem is referenced by:  iccsupr  10174  iccshftri  10203  iccshftli  10205  iccdili  10207  icccntri  10209  unitssre  10213  iccen  10214  cos12dec  12294  suplociccreex  15313  suplociccex  15314  dedekindicclemuub  15315  dedekindicclemlu  15319  dedekindicclemeu  15320  dedekindicclemicc  15321  dedekindicc  15322  reeff1olem  15460  cosz12  15469  ioocosf1o  15543