How to do arithmetic on a contextual filter Rather than specifying a contextual filter, is it possible to specify a contextual filter +1 (i.e. add one to the current filter value?)

If you have a view taking an argument, i understand that you can create a global text field to make a link to a different view using the original argument.

I.e. in view1/arg1 i can have a global text field which outputs as a link to
view2/arg1

Is it possible to create a global text field which outputs as a link to view2/arg1+1 

i.e. adds one to the current argument?
In Views for D7 (not sure about D6) you can add a field of type "Math expression" to do this sort of thing.  Enter the expression [!1]+1 (or maybe [%1]+1) in the Math expression field, and then later text fields can refer to this value (in their Rewrite sections) as [expression].