Updated version

psystems.sty

@@ -1,5 +1,5 @@
 %% psystems.sty
-%% Copyright 2014, 2016, 2017 Antonio E. Porreca <[email protected]>
+%% Copyright 2014, 2016, 2017, 2019 Antonio E. Porreca <[email protected]>
 %
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
@@ -16,7 +16,7 @@
 %
 % This work consists of the file psystems.sty.
 
-% LaTeX macros for P systems
+% LaTeX macros for membrane computing (P systems)
 
 % If you explicitly use the package `complexity', use the command
 % \usepackage[options]{complexity} before \usepackage{psystems}. This
@@ -26,7 +26,7 @@
 
 \NeedsTeXFormat{LaTeX2e}[1994/06/01]
 \ProvidesPackage{psystems}
-  [2017/09/07 v1.1 LaTeX macros for P systems]
+  [2019/01/29 v1.2 LaTeX macros for membrane computing (P systems)]
 
 % Configurations of P systems
 \newcommand{\conf}[1]{\mathcal{#1}}