<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE PROOF SYSTEM "http://a3pat.ensiie.fr/pub/a3pat.dtd">
<PROOF><SIGNATURE><SYMBOLLIST><SYMBOL arity="1" unmarked=""><NAME>sum</NAME></SYMBOL><SYMBOL arity="1" unmarked="sum"><NAME>Marked_sum</NAME></SYMBOL><SYMBOL arity="2" unmarked=""><NAME> *</NAME></SYMBOL><SYMBOL arity="2" unmarked="app"><NAME>Marked_app</NAME></SYMBOL><SYMBOL arity="0" unmarked=""><NAME>nil</NAME></SYMBOL><SYMBOL arity="1" unmarked="prod"><NAME>Marked_prod</NAME></SYMBOL><SYMBOL arity="0" unmarked=""><NAME>0</NAME></SYMBOL><SYMBOL arity="2" unmarked=""><NAME>cons</NAME></SYMBOL><SYMBOL arity="2" unmarked="*"><NAME>Marked_*</NAME></SYMBOL><SYMBOL arity="1" unmarked=""><NAME>s</NAME></SYMBOL><SYMBOL arity="2" unmarked="+"><NAME>Marked_+</NAME></SYMBOL><SYMBOL arity="2" unmarked=""><NAME>app</NAME></SYMBOL><SYMBOL arity="1" unmarked=""><NAME>prod</NAME></SYMBOL><SYMBOL arity="2" unmarked=""><NAME>+</NAME></SYMBOL></SYMBOLLIST><VARLIST><VAR>x</VAR><VAR>y</VAR><VAR>z</VAR><VAR>l</VAR><VAR>l1</VAR><VAR>l2</VAR></VARLIST></SIGNATURE><PROPERTY criterion="dp" prop="sntrs"><SYSTEM><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS></SYSTEM><CRITERION/><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_+(s(x),s(y))</LHS><RHS>Marked_+(x,y)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(x,+(y,z))</RHS></DPRULE><DPRULE num="2"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(y,z)</RHS></DPRULE><DPRULE num="3"><LHS>Marked_*(s(x),s(y))</LHS><RHS>Marked_+( *(x,y),+(x,y))</RHS></DPRULE><DPRULE num="4"><LHS>Marked_*(s(x),s(y))</LHS><RHS>Marked_*(x,y)</RHS></DPRULE><DPRULE num="5"><LHS>Marked_*(s(x),s(y))</LHS><RHS>Marked_+(x,y)</RHS></DPRULE><DPRULE num="6"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(x, *(y,z))</RHS></DPRULE><DPRULE num="7"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(y,z)</RHS></DPRULE><DPRULE num="8"><LHS>Marked_app(cons(x,l1),l2)</LHS><RHS>Marked_app(l1,l2)</RHS></DPRULE><DPRULE num="9"><LHS>Marked_sum(cons(x,l))</LHS><RHS>Marked_+(x,sum(l))</RHS></DPRULE><DPRULE num="10"><LHS>Marked_sum(cons(x,l))</LHS><RHS>Marked_sum(l)</RHS></DPRULE><DPRULE num="11"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_+(sum(l1),sum(l2))</RHS></DPRULE><DPRULE num="12"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l1)</RHS></DPRULE><DPRULE num="13"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l2)</RHS></DPRULE><DPRULE num="14"><LHS>Marked_prod(cons(x,l))</LHS><RHS>Marked_*(x,prod(l))</RHS></DPRULE><DPRULE num="15"><LHS>Marked_prod(cons(x,l))</LHS><RHS>Marked_prod(l)</RHS></DPRULE><DPRULE num="16"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_*(prod(l1),prod(l2))</RHS></DPRULE><DPRULE num="17"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l1)</RHS></DPRULE><DPRULE num="18"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l2)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST><SCC num="0"><NODE ref="15"/><NODE ref="17"/><NODE ref="18"/></SCC><NONSCC num="1"><NODE ref="16"/></NONSCC><NONSCC num="2"><NODE ref="14"/></NONSCC><SCC num="3"><NODE ref="4"/><NODE ref="6"/><NODE ref="7"/></SCC><NONSCC num="4"><NODE ref="5"/></NONSCC><NONSCC num="5"><NODE ref="3"/></NONSCC><SCC num="6"><NODE ref="10"/><NODE ref="12"/><NODE ref="13"/></SCC><NONSCC num="7"><NODE ref="11"/></NONSCC><NONSCC num="8"><NODE ref="9"/></NONSCC><SCC num="9"><NODE ref="0"/><NODE ref="1"/><NODE ref="2"/></SCC><SCC num="10"><NODE ref="8"/></SCC></CCLIST><EDGE end="2" start="0"/><EDGE end="1" start="0"/><EDGE end="5" start="1"/><EDGE end="4" start="1"/><EDGE end="3" start="1"/><EDGE end="5" start="2"/><EDGE end="4" start="2"/><EDGE end="3" start="2"/><EDGE end="5" start="3"/><EDGE end="4" start="3"/><EDGE end="9" start="4"/><EDGE end="9" start="5"/><EDGE end="8" start="6"/><EDGE end="7" start="6"/><EDGE end="9" start="7"/><EDGE end="9" start="8"/></DAG></CRITERION><PROPERTY criterion="sterm" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_app(cons(x,l1),l2)</LHS><RHS>Marked_app(l1,l2)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><PROJECTION><PROJ><SYMBOL><NAME>Marked_app</NAME></SYMBOL><INT>1</INT></PROJ></PROJECTION><STRICTPAIRS><DPLIST><DPRULE num="0"><LHS>Marked_app(cons(x,l1),l2)</LHS><RHS>Marked_app(l1,l2)</RHS></DPRULE></DPLIST></STRICTPAIRS><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST/></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST/></DAG></CRITERION></PROPERTY></PROPERTY><PROPERTY criterion="sterm" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_sum(cons(x,l))</LHS><RHS>Marked_sum(l)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l1)</RHS></DPRULE><DPRULE num="2"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l2)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><PROJECTION><PROJ><SYMBOL><NAME>Marked_sum</NAME></SYMBOL><INT>1</INT></PROJ></PROJECTION><STRICTPAIRS><DPLIST><DPRULE num="0"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l2)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_sum(app(l1,l2))</LHS><RHS>Marked_sum(l1)</RHS></DPRULE><DPRULE num="2"><LHS>Marked_sum(cons(x,l))</LHS><RHS>Marked_sum(l)</RHS></DPRULE></DPLIST></STRICTPAIRS><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST/></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST/></DAG></CRITERION></PROPERTY></PROPERTY><PROPERTY criterion="sterm" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_prod(cons(x,l))</LHS><RHS>Marked_prod(l)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l1)</RHS></DPRULE><DPRULE num="2"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l2)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><PROJECTION><PROJ><SYMBOL><NAME>Marked_prod</NAME></SYMBOL><INT>1</INT></PROJ></PROJECTION><STRICTPAIRS><DPLIST><DPRULE num="0"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l2)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_prod(app(l1,l2))</LHS><RHS>Marked_prod(l1)</RHS></DPRULE><DPRULE num="2"><LHS>Marked_prod(cons(x,l))</LHS><RHS>Marked_prod(l)</RHS></DPRULE></DPLIST></STRICTPAIRS><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST/></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST/></DAG></CRITERION></PROPERTY></PROPERTY><PROPERTY criterion="sterm" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_*(s(x),s(y))</LHS><RHS>Marked_*(x,y)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(x, *(y,z))</RHS></DPRULE><DPRULE num="2"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(y,z)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><PROJECTION><PROJ><SYMBOL><NAME>Marked_*</NAME></SYMBOL><INT>1</INT></PROJ></PROJECTION><STRICTPAIRS><DPLIST><DPRULE num="0"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(y,z)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_*( *(x,y),z)</LHS><RHS>Marked_*(x, *(y,z))</RHS></DPRULE><DPRULE num="2"><LHS>Marked_*(s(x),s(y))</LHS><RHS>Marked_*(x,y)</RHS></DPRULE></DPLIST></STRICTPAIRS><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST/></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST/></DAG></CRITERION></PROPERTY></PROPERTY><PROPERTY criterion="sterm" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST><DPRULE num="0"><LHS>Marked_+(s(x),s(y))</LHS><RHS>Marked_+(x,y)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(x,+(y,z))</RHS></DPRULE><DPRULE num="2"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(y,z)</RHS></DPRULE></DPLIST></DPSYS></SYSTEM><PROJECTION><PROJ><SYMBOL><NAME>Marked_+</NAME></SYMBOL><INT>1</INT></PROJ></PROJECTION><STRICTPAIRS><DPLIST><DPRULE num="0"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(y,z)</RHS></DPRULE><DPRULE num="1"><LHS>Marked_+(+(x,y),z)</LHS><RHS>Marked_+(x,+(y,z))</RHS></DPRULE><DPRULE num="2"><LHS>Marked_+(s(x),s(y))</LHS><RHS>Marked_+(x,y)</RHS></DPRULE></DPLIST></STRICTPAIRS><PROPERTY criterion="weakgraph" prop="sndp"><SYSTEM><DPSYS><REWSYS><RULE><LHS>+(x,0)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(0,x)</LHS><RHS>x</RHS></RULE><RULE><LHS>+(s(x),s(y))</LHS><RHS>s(s(+(x,y)))</RHS></RULE><RULE><LHS>+(+(x,y),z)</LHS><RHS>+(x,+(y,z))</RHS></RULE><RULE><LHS> *(x,0)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(0,x)</LHS><RHS>0</RHS></RULE><RULE><LHS> *(s(x),s(y))</LHS><RHS>s(+( *(x,y),+(x,y)))</RHS></RULE><RULE><LHS> *( *(x,y),z)</LHS><RHS> *(x, *(y,z))</RHS></RULE><RULE><LHS>app(nil,l)</LHS><RHS>l</RHS></RULE><RULE><LHS>app(cons(x,l1),l2)</LHS><RHS>cons(x,app(l1,l2))</RHS></RULE><RULE><LHS>sum(nil)</LHS><RHS>0</RHS></RULE><RULE><LHS>sum(cons(x,l))</LHS><RHS>+(x,sum(l))</RHS></RULE><RULE><LHS>sum(app(l1,l2))</LHS><RHS>+(sum(l1),sum(l2))</RHS></RULE><RULE><LHS>prod(nil)</LHS><RHS>s(0)</RHS></RULE><RULE><LHS>prod(cons(x,l))</LHS><RHS> *(x,prod(l))</RHS></RULE><RULE><LHS>prod(app(l1,l2))</LHS><RHS> *(prod(l1),prod(l2))</RHS></RULE></REWSYS><DPLIST/></DPSYS></SYSTEM><CRITERION><DAG approx="simpl"><CCLIST/></DAG></CRITERION></PROPERTY></PROPERTY></PROPERTY></PROPERTY></PROOF>
