PartitionsQ[n] gives the number q (n) of partitions of the integer n into distinct parts.

expr[[i]] or Part[expr, i] gives the i\[Null]^th part of expr. expr[[-i]] counts from the end. expr[[i, j, ...]] or Part[expr, i, j, ...] is equivalent to expr[[i]][[j]] .... ...

PascalDistribution[n, p] represents a Pascal distribution with parameters n and p.

PassEventsDown is an option to EventHandler which specifies whether events handled by a particular event handler should be passed down to event handlers nested inside.

PassEventsUp is an option to EventHandler that specifies whether events handled by a particular event handler should be passed up to event handlers in outer expressions.

PasteBoxFormInlineCells is an option for cells that specifies whether a new inline cell is created when a typeset expression is pasted into a non-box-type cell.

PasteButton[expr] represents a button that pastes expr whenever it is pressed. PasteButton[label, expr] displays with label on the button.

Paste[expr] pastes expr at the current insertion point in the input notebook. Paste[notebook, expr] pastes expr to the specified notebook.Paste[] pastes the contents of the ...

PathGraph[{v_1, v_2, ...}] yields a path with vertices v_i and edges between v_i and v i +\[ThinSpace]1 .PathGraph[{e_1, e_2, ...}] yields a path with edges ...

PathGraphQ[g] yields True if the graph g is a path and False otherwise.