Theorem iccssre 10147

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 10130	. . . . 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 4082  (class class class)co 6000   RRcr 7994   <_ cle 8178   [,]cicc 10083

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 4201  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-setind 4628  ax-cnex 8086  ax-resscn 8087  ax-pre-ltirr 8107  ax-pre-ltwlin 8108  ax-pre-lttrn 8109

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 3888  df-br 4083  df-opab 4145  df-id 4383  df-po 4386  df-iso 4387  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-iota 5277  df-fun 5319  df-fv 5325  df-ov 6003  df-oprab 6004  df-mpo 6005  df-pnf 8179  df-mnf 8180  df-xr 8181  df-ltxr 8182  df-le 8183  df-icc 10087

This theorem is referenced by:  iccsupr  10158  iccshftri  10187  iccshftli  10189  iccdili  10191  icccntri  10193  unitssre  10197  iccen  10198  cos12dec  12274  suplociccreex  15292  suplociccex  15293  dedekindicclemuub  15294  dedekindicclemlu  15298  dedekindicclemeu  15299  dedekindicclemicc  15300  dedekindicc  15301  reeff1olem  15439  cosz12  15448  ioocosf1o  15522