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eval coprod_cofst: coprod id id (cofst a) =d> coprod id id ((λlv.(λa b.a b) (λlf rf.lf lv)) a) =b> coprod id id ((λa b.a b) (λlf rf.lf a)) =b> coprod id id (λb.(λlf rf.lf a) b) =*> coprod id id (λlf rf.lf a) =d> (λlf rf.λv.v lf rf) id id (λlf rf.lf a) =*> (λv.v id id) (λlf rf.lf a) =b> (λlf rf.lf a) id id =*> id a =*> a

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eval coprod_cofst：coprod id（cofst a）= d> coprod id id（（λlv。（λaba b）（λlfrf.lf lv））a）= b> coprod id（（λaba b） （λlfrf.lf a）b）= *> coprod id（λlfrf.lf a）= d>（λlfrf.λv.vlf rf）id id = =>（idlf rf.lf a）= b>（λlfrf.lf a）id id = *> id a = * a

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eval coprod_cofst：coprod id（cofst a）= d> coprod id id（（λlv。（λaba b）（λlfrf.lf lv））a）= b> coprod id（（λaba b） （λlfrf.lf a）b）= *> coprod id（λlfrf.lf a）= d>（λlfrf.λv.vlf rf）id id = =>（idlf rf.lf a）= b>（λlfrf.lf a）id id = *> id a = * a

INTO JAPANESE

a）= b> coprod id（（λabab）（λlfrf.lfa）b）この値は、 =>> coprod id（λlfrf.lfa）= d>（λlfrf.vv.vlfrf）id id = =（idlf rf.lf a）= b>（λlfrf.lfa）id id = *> id a = * a

BACK INTO ENGLISH

a）= b> coprod id（（λabab）（λlfrf.lfa）b）この値は、 =>> coprod id（λlfrf.lfa）= d>（λlfrf.vv.vlfrf）id id = =（idlf rf.lf a）= b>（λlfrf.lfa）id id = *> id a = * a

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a) b = > coprod id((λabab) (λlfrf.lfa) b) coprod id(λlfrf.lfa) =>> この値は、d = > (λlfrf.vv.vlfrf) id = =(idlf rf.lf a) = b > (λlfrf.lfa) id = * > id = *、

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a) b = > coprod id ((abab λ) (λ lfrf.lfa) b) coprod id (λ lfrf.lfa) = "" this value is d = > (λ lfrf.vv.vlfrf) id == idlf rf.lf b = b > (Λ lfrf.lfa) id = * > id = *,

INTO JAPANESE

この値はd =>（λlfrf.vv.vlfrf）であり、id == idlf rfである。 .lf b = b>（Λlfrf。lfa）id = *> id = *、

BACK INTO ENGLISH

This value is d => (λlfrf.vv.vlfrf), and id == idlf rf. .lf b = b> (Λlfrf.lfa) id = *> id = *,

INTO JAPANESE

この値はd =>（λlfrf.vv.vlfrf）であり、id == idlf rfです。 .lf b = b>（lfrf.lfa）id = *> id = *、

BACK INTO ENGLISH

This value is d = > (λ lfrf.vv.vlfrf), and is the idlf rf id ==..lf b = > (lfrf.lfa)id = * > id = *,

INTO JAPANESE

この値はd =>（λlfrf.vv.vlfrf）であり、idlf rf id == .. lf b =>（lfrf.lfa）id = *> id = *であり、

BACK INTO ENGLISH

This value is d => (λlfrf.vv.vlfrf), idlf rf id == .. lf b => (lfrf.lfa) id = *> id = *,

INTO JAPANESE

この値は、d =>（λlfrf.vv.vlfrf）、idlf rf id == .. lf b =>（lfrf.lfa）id = *> id = *、

BACK INTO ENGLISH

This value is d => (λlfrf.vv.vlfrf), idlf rf id == .. lf b => (lfrf.lfa) id = *> id = *,