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Info_Mac IV CD-ROM (Pacific HiTech Inc.)(August 1994).iso
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Science
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MAL ©P.f.Howden 1⁄1⁄89
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DIFFROOTSEQNS.TXT
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1987-08-26
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926b
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21 lines
'DIFFROOTSEQNS.TXT are test eqns to be MERGEd with DIFFROOTS.
'These desired lines MUST REPLACE THE same in DIFFROOTS.
'After use,a fresh DIFFROOTS MUST be loaded.See page128 in book THE UNIVERSAL EQUATION SOLVER FOR details.
'10 F(0)=2*X(0)-3*X(1)-17: RETURN
'11 F(1)=X(0)+X(1)-1: RETURN
'2 SIMULTANEOUS ALGEBRAICS.All R, starting C=0.
'12 F(2)=X(2)-C(0)*ATN(X(2)/SQR(-X(2)^2+1))-SIN(T)-T*SIN(T):RETURN
'13 F(3)=X(3)-C(1)*ATN(X(2)/SQR(-X(2)^2+1))-T*COS(T)-COS(T)-SIN(T)-C(0)*X(3)/(1-X(2)^2)^.5:RETURN
'IMPLICIT 2nd ORDER Nonlin D.E.: Starting C's=0,-1: solution Xo=-SIN T.
'12 F(2)=8*X(2)^2-2-C(10)*C(1):RETURN
'13 F(3)=16*X(2)*X(3)-C(10)*X(2)-X(11)*C(1): RETURN
'21 F(11)=X(11)^2-1-C(1)^2:RETURN
'22 F(12)=2*X(12)*X(11)-2*C(1)*X(2):RETURN
'CATENARY 2nd +1st ORDER Nonlin D.E. : C(J)=2,0 for 2nd order,0 for 1st order.
'Xo=EXP T/2+EXP-T/2=2.255252 ;X1=EXP T/2-EXP-T/2=1.042191 @T=1.
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