Karl Berry Olaf Bachmann and many others. Nonterminal symbols in the grammar are enclosed in angle brackets. Terminal tokens are in all capitals. Bare words and symbols stand for themselves. Since this grammar is ambiguous, the following table summarizes the precedences and associativities of operators within expressions.
Precedences decrease from top to bottom.
This defines a first-order differential equation. If a dynamic variable does not appear on the left side of a statement of this form, its derivative is assumed to be zero. That is, it is a symbolic constant. Dynamic variables that have not been initialized in this way are set to zero. The second is its final value.