Description: Concatenation of fixed length strings. (Contributed by Mario Carneiro, 26-Feb-2016)
Ref | Expression | ||
---|---|---|---|
Assertion | s4s4 | |- <" A B C D E F G H "> = ( <" A B C D "> ++ <" E F G H "> ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-s4 | |- <" E F G H "> = ( <" E F G "> ++ <" H "> ) |
|
2 | s4cli | |- <" A B C D "> e. Word _V |
|
3 | s3cli | |- <" E F G "> e. Word _V |
|
4 | df-s8 | |- <" A B C D E F G H "> = ( <" A B C D E F G "> ++ <" H "> ) |
|
5 | s4s3 | |- <" A B C D E F G "> = ( <" A B C D "> ++ <" E F G "> ) |
|
6 | 1 2 3 4 5 | cats1cat | |- <" A B C D E F G H "> = ( <" A B C D "> ++ <" E F G H "> ) |