Non-terminating q-Whippleの変換公式 の記事で示した積分表示8ϕ7[a,aq,−aq,b,c,d,e,fa,−a,aq/b,aq/c,aq/d,aq/e,aq/f;a2q2bcdef]=1def−aq(aq,aq/bc,d,e,f,aq/de,aq/df,aq/ef;q)∞(aq/b,aq/c,aq/d,aq/e,aq/f,aq2/def,def/a,q;q)∞∫aqdef(atq/bdef,atq/cdef,tq/def,t/a;q)∞(t/de,t/df,t/ef,atq/bcdef;q)∞dqtを使いやすいように整理しておく.W(a;b,c,d,e,f;x)=8ϕ7[a,aq,−aq,b,c,d,e,fa,−a,aq/b,aq/c,aq/d,aq/e,aq/f;x]のように書くことにすると,∫aqdef(atq/bdef,atq/cdef,tq/def,t/a;q)∞(t/de,t/df,t/ef,atq/bcdef;q)∞dqt=(def−aq)(aq/b,aq/c,aq/d,aq/e,aq/f,aq2/def,def/a,q;q)∞(aq,aq/bc,d,e,f,aq/de,aq/df,aq/ef;q)∞W(a;b,c,d,e,f;a2q2bcdef)である. これは,∫agqdefg(atq/bdefg,atq/cdefg,tq/defg,t/ag;q)∞(t/deg,t/dfg,t/efg,atq/bcdefg;q)∞dqt=(defg−agq)(aq/b,aq/c,aq/d,aq/e,aq/f,aq2/def,def/a,q;q)∞(aq,aq/bc,d,e,f,aq/de,aq/df,aq/ef;q)∞W(a;b,c,d,e,f;a2q2bcdef)と同値である. a↦a/gq,defg=hとすると,∫ah(at/bgh,at/cgh,tq/h,tq/a;q)∞(td/h,te/h,tf/h,at/bcgh;q)∞dqt=(h−a)(a/bg,a/cg,a/dg,a/eg,a/fg,aq/h,hq/a,q;q)∞(a/g,a/bcg,d,e,f,ad/h,ae/h,af/h;q)∞W(a/gq;b,c,d,e,f;a2bcgh)b↦a/bgh,c↦a/cgh,d↦dh,e↦eh,f↦fhとすると, 条件はdefgh2=1となり,∫ah(bt,ct,tq/h,tq/a;q)∞(dt,et,ft,bcght/a;q)∞dqt=(h−a)(bh,ch,a/dgh,a/egh,a/fgh,aq/h,hq/a,q;q)∞(a/g,bcgh2/a,dh,eh,fh,ad,ae,af;q)∞W(a/gq;a/bgh,a/cgh,dh,eh,fh;bcgh)だから, k=bcgh/aとすれば, 条件はadefhk=bcとなり, このとき,∫ah(bt,ct,tq/h,tq/a;q)∞(dt,et,ft,kt;q)∞dqt=(h−a)(bh,ch,bc/dk,bc/ek,bc/fk,aq/h,hq/a,q;q)∞(bch/k,hk,dh,eh,fh,ad,ae,af;q)∞W(bch/kq;b/k,c/k,dh,eh,fh;ak)よって変数を付け替えて, 以下を得る.
cd=abefghのとき,∫ab(tq/a,tq/b,ct,dt;q)∞(et,ft,gt,ht;q)∞dqt=(b−a)(bc,bd,cd/eh,cd/fh,cd/gh,aq/b,bq/a,q;q)∞(bcd/h,be,bf,bg,bh,ae,af,ag;q)∞W(bcd/hq;c/h,d/h,be,bf,bg;ah)が成り立つ.
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