Where is views exposed form's submit handler located? When views exposed form is submitted without ajax it redirects to somepage like http://example.com/reports?taxonomy=tid&amp;date=27%20F6%20f2005 etc.

I am curious to know ,in views module,inc file where it's submit handler is located,where is ajax callback?

I tried for some hours but no luck.

I know about hooks like form alter but that's not a concern.

I have no specific requirements,just for drupal learning :)
All of its functions are handled in programmatic way. You can look all functions are declared in theme.inc file located at module/views/theme/theme.inc location. Its hard to understand that core functions. But if you want to play with these functions then you will have to use the hooks . 

NOTE: Never try to change any core file.