references in English, Relations and functions (mappings)

Set theory topics in other texts. The notation may not follow exactly the one we are using.  

[JH_GUIDE] 13-19, 30-37.

[GP_MDSCS] 111-134, 141-155

[WBOOK] Discrete Mathematics/Functions and relations

[VK_DSLN] 31-36

[RP_CDS] 5-8

The bracket expressions refer to References in English main page.