- \PSEM{p_1\#p_2}{x} &=& \PPSEM{p_1}{*,x}\wedge\PPSEM{p_2}{x,*}\\
- \PSEM{\cent p_1\#p_2}{x} &=& \PPSEM{p_1}{\cent,x}\wedge\PPSEM{p_2}{x,*}\\
- \PSEM{p_1\#p_2\$}{x} &=& \PPSEM{p_1}{*,x}\wedge\PPSEM{p_2}{x,\$}\\
- \PSEM{\cent p_1\#p_2\$}{x} &=& \PPSEM{p_1}{\cent,x}\wedge\PPSEM{p_2}{x,\$}\\[3ex]
- \PPSEM{}{*,x} &=& \mathit{true}\\
- \PPSEM{}{\cent,x} &=& \PREV{x}=\emptyset\\
- \PPSEM{}{x,*} &=& \mathit{true}\\
- \PPSEM{}{x,\$} &=& \NEXT{x}=\emptyset\\
- \PPSEM{p\;c}{\alpha,x} &=& \CSEM{c}{\PREV{x}}\ne\emptyset\wedge\PPSEM{p}{\alpha,\PREV{x}}\\
- \PPSEM{c\;p}{x,\alpha} &=& \CSEM{c}{\NEXT{x}}\ne\emptyset\wedge\PPSEM{p}{\NEXT{x},\alpha}\\
+ \PSEM{p_1\#p_2}{x} &=& \PPSEM{p_1}{*,\PREV{x}}\wedge\PPSEM{p_2}{\NEXT{x},*}\\
+ \PSEM{\cent p_1\#p_2}{x} &=& \PPSEM{p_1}{\cent,\PREV{x}}\wedge\PPSEM{p_2}{\NEXT{x},*}\\
+ \PSEM{p_1\#p_2\$}{x} &=& \PPSEM{p_1}{*,\PREV{x}}\wedge\PPSEM{p_2}{\NEXT{x},\$}\\
+ \PSEM{\cent p_1\#p_2\$}{x} &=& \PPSEM{p_1}{\cent,\PREV{x}}\wedge\PPSEM{p_2}{\NEXT{x},\$}\\[3ex]
+ \PPSEM{}{*,\alpha} &=& \mathit{true}\\
+ \PPSEM{}{\cent,\alpha} &=& \alpha=\emptyset\\
+ \PPSEM{p\;c}{\alpha,\emptyset} &=& \mathit{false}\\
+ \PPSEM{p\;c}{\alpha,\{x\}} &=& \CSEM{c}{x}\ne\emptyset\wedge\PPSEM{p}{\alpha,\PREV{x}}\\
+ \PPSEM{}{\alpha,*} &=& \mathit{true}\\
+ \PPSEM{}{\alpha,\$} &=& \alpha=\emptyset\\
+ \PPSEM{c\;p}{\emptyset,\alpha} &=& \mathit{false}\\
+ \PPSEM{c\;p}{\{x\},\alpha} &=& \CSEM{c}{x}\ne\emptyset\wedge\PPSEM{p}{\NEXT{x},\alpha}\\