New in version 1.1 Prior to version 1.1, space characters (ascii 32) were added by default around operators. It is now possible to control that behaviour via the SERIALIZE_NO_WS option : SQL> begin 2 dbms_output.put_line( 3 plcalc.serialize(plcalc.compile('-x-(y+z)')) 4 ); 5 ...
The horizontal line is always as long as necessary to reach the left and right end of both numbers (and operators) directly below and above it. That means it begins in the same column where the leftmost digit or operator of that two lines (one below and one above) is. It ends in ...
The underlying semantic model is based on the properties of monotone contraction operators on a lattice, an algebraic setting in which fixed point semantics take an especially elegant form. 展开 出版时间: 09/27/1993 ISBN: 0-262-02353-9 被引量: 292 ...
We can describe the truth of Q as a propositional formula F in terms of Sj, i.e., as a combination of statements Sj linked by operators like &, ∨, and ¬; computing p(Q) exactly is NP-hard, so heuristics are needed. Traditionally, expert systems use technique similar to ...