{VERSION 6 0 "Windows XP" "6.0" }
{USTYLETAB {PSTYLE "Warning" -1 7 1 {CSTYLE "" -1 -1 "Courier" 1 12 0 
0 255 1 0 0 0 2 2 1 0 0 0 1 }1 0 0 -1 -1 -1 1 0 1 0 2 2 -1 1 }{PSTYLE 
"Dash Item" -1 16 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 
0 0 0 1 }1 0 0 -1 3 3 1 0 1 0 2 2 -1 3 }{PSTYLE "Heading 4" -1 20 1 
{CSTYLE "" -1 -1 "MS Serif" 1 12 0 0 0 0 1 0 0 2 2 2 0 0 0 1 }1 0 0 
-1 0 0 1 0 1 0 2 2 -1 1 }{PSTYLE "Heading 3" -1 5 1 {CSTYLE "" -1 -1 "
MS Serif" 1 14 0 0 0 0 1 1 0 2 2 2 0 0 0 1 }1 0 0 -1 0 0 1 0 1 0 2 2 
-1 1 }{PSTYLE "Error" -1 8 1 {CSTYLE "" -1 -1 "Courier" 1 12 255 0 
255 1 0 0 0 2 2 1 0 0 0 1 }1 0 0 -1 -1 -1 1 0 1 0 2 2 -1 1 }{PSTYLE "A
uthor" -1 19 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 0 0 0 0 2 2 2 0 0 
0 1 }3 0 0 -1 8 8 1 0 1 0 2 2 -1 1 }{PSTYLE "Heading 2" -1 4 1 
{CSTYLE "" -1 -1 "MS Serif" 1 16 0 0 0 0 0 1 0 2 2 2 0 0 0 1 }1 0 0 
-1 8 2 1 0 1 0 2 2 -1 1 }{PSTYLE "Text Output" -1 2 1 {CSTYLE "" -1 
-1 "Courier" 1 12 0 0 255 1 0 0 0 2 2 1 0 0 0 1 }1 0 0 -1 -1 -1 1 0 1 
0 2 2 -1 1 }{PSTYLE "Heading 1" -1 3 1 {CSTYLE "" -1 -1 "MS Serif" 1 
18 0 0 0 0 0 1 0 2 2 2 0 0 0 1 }1 0 0 -1 8 4 1 0 1 0 2 2 -1 1 }
{PSTYLE "Normal" -1 0 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 
2 2 0 0 0 1 }1 0 0 0 0 0 2 0 2 0 2 2 -1 1 }{PSTYLE "Maple Plot" -1 13 
1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 }3 0 0 -1 -1 -1 
1 0 1 0 2 2 -1 1 }{PSTYLE "Line Printed Output" -1 6 1 {CSTYLE "" -1 
-1 "Courier" 1 12 0 0 255 1 0 0 0 2 2 1 0 0 0 1 }1 0 0 -1 -1 -1 1 0 1 
0 2 2 -1 1 }{PSTYLE "Title" -1 18 1 {CSTYLE "" -1 -1 "Times" 1 18 0 0 
0 0 0 1 1 2 2 2 0 0 0 1 }3 0 0 -1 12 12 1 0 1 0 2 2 -1 1 }{PSTYLE "Map
le Output" -1 11 1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 }3 3 0 -1 -1 -1 1 0 1 0 2 2 -1 1 }{PSTYLE "List Item" -1 14 1 
{CSTYLE "" -1 -1 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 0 0 0 1 }1 0 0 -1 3 
3 1 0 1 0 2 2 -1 5 }{PSTYLE "Bullet Item" -1 15 1 {CSTYLE "" -1 -1 "Ti
mes" 1 12 0 0 0 1 2 2 2 2 2 2 0 0 0 1 }1 0 0 -1 3 3 1 0 1 0 2 2 -1 2 }
{CSTYLE "Text" -1 200 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 0 0 0 1 }
{CSTYLE "2D Input" -1 19 "Times" 1 12 255 0 0 1 0 0 0 2 1 2 0 0 0 1 }
{CSTYLE "Hyperlink" -1 17 "MS Serif" 1 12 0 128 128 1 0 0 1 2 2 2 0 0 
0 1 }{CSTYLE "2D Output" -1 20 "Times" 1 12 0 0 255 1 0 0 0 2 2 1 0 0 
0 1 }{CSTYLE "Maple Input" -1 0 "Courier" 1 12 255 0 0 1 0 1 0 2 1 2 
0 0 0 1 }{CSTYLE "Page Number" -1 33 "Times" 1 10 0 0 0 0 0 0 2 2 2 2 
0 0 0 1 }{CSTYLE "2D Math" -1 2 "Times" 1 12 0 0 0 1 0 0 0 2 2 2 0 0 
0 1 }{PSTYLE "_pstyle1" -1 200 1 {CSTYLE "" -1 -1 "Times" 1 12 0 0 0 
1 2 2 2 2 2 2 1 0 0 1 }1 0 0 0 0 0 2 0 2 0 2 2 -1 1 }{CSTYLE "_cstyle1
" -1 201 "Times" 1 12 0 0 0 1 2 2 2 2 2 2 0 0 0 1 }{CSTYLE "_cstyle2" 
-1 202 "Courier" 1 12 255 0 0 1 0 1 0 2 1 2 0 0 0 1 }{PSTYLE "_pstyle2
" -1 201 1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 0 0 0 0 2 2 2 0 0 0 1 }3 0 0 
-1 -1 -1 1 0 1 0 2 2 -1 1 }{PSTYLE "_pstyle3" -1 202 1 {CSTYLE "" -1 
-1 "Times" 1 12 0 0 255 1 0 0 0 2 2 1 0 0 0 1 }3 3 0 -1 -1 -1 1 0 1 0 
2 2 -1 1 }{CSTYLE "_cstyle3" -1 203 "Times" 1 12 0 0 255 1 0 0 0 2 2 
2 0 0 0 1 }{PSTYLE "_pstyle4" -1 203 1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 
0 0 0 0 2 2 2 0 0 0 1 }0 0 0 -1 -1 -1 1 0 1 0 2 2 -1 1 }}
{SECT 0 {EXCHG {PARA 200 "" 0 "" {TEXT 201 12 "Number 3.1.1" }}}
{EXCHG {PARA 200 "> " 0 "" {MPLTEXT 1 202 74 "plot([(-r + sqrt(r^2 - 4
))/2,(-r - sqrt(r^2 - 4))/2],r=-5..5,thickness=3);" }}{PARA 201 "" 1 "
" {GLPLOT2D 400 400 400 {PLOTDATA 2 "6'-%'CURVESG6%7M7$$!\"&\"\"!$\"3Y
>zZZyG\"z%!#<7$$!35+++e%G?y%F-$\"3[*R2a0oGc%F-7$$!3w*****fesBf%F-$\"3-
f7\"z0#=jVF-7$$!3!******4s%3zVF-$\"3#z_v@B'QPTF-7$$!3?+++YIQkTF-$\"3YM
loZD`3RF-7$$!31+++6=q]RF-$\"3q*pd$[*z)yOF-7$$!3'******>&>f_PF-$\"3izYa
;+!RY$F-7$$!3!*******o1YZNF-$\"3XT&3)eUpQKF-7$$!3#)*****>g8`L$F-$\"3K6
ek&fFA+$F-7$$!3:+++%*o%Q7$F-$\"3Qvql\"ze<w#F-7$$!37+++#RFj!HF-$\"3Te[O
/$Gv]#F-7$$!3@+++'4OZr#F-$\"3349b=x@vAF-7$$!3?+++v'\\!*\\#F-$\"3%*)pE@
jK()*>F-7$$!3%)*****\\ixCG#F-$\"3)*)o[.cr6p\"F-7$$!35+++vR7y@F-$\"3)=>
UP4//_\"F-7$$!3#******\\KqP2#F-$\"3!fX7w@&)4J\"F-7$$!3!)*****zaz+0#F-$
\"3%*G2G(*3A]7F-7$$!31+++q()QE?F-$\"3/+V1bb<w6F-7$$!3>+++\"QVX,#F-$\"3
Dm_tmm3G6F-7$$!3()*****>*zp-?F-$\"3)e$f94(3L0\"F-7$I*undefinedGI*prote
ctedGFiqFhq7$$\"3@+++/DZ+?F-$!33`O[5\"y\\y*!#=7$$\"3$******f#oe1?F-$!3
Jz8jXNn?#*F_r7$$\"3#******4Z:)=?F-$!3P-pnI+;>()F_r7$$\"3!******f6W5.#F
-$!3]$30J`ikQ)F_r7$$\"3')*****fS,b0#F-$!3b/r$*4aM0zF_r7$$\"3#******ppe
*z?F-$!3nsu2qS(Ra(F_r7$$\"3y******4=\"p=#F-$!3Gqk,LAP6lF_r7$$\"3=+++C
\\'QH#F-$!3SE0A)z%z_eF_r7$$\"3y*****zY*\\%R#F-$!3#eDvX]K\"*Q&F_r7$$\"3
#******H,M^\\#F-$!3]4f!\\\\!H;]F_r7$$\"3=+++0#=bq#F-$!3!e^&f-CR<WF_r7$
$\"3\"******p?27\"HF-$!3G!G-=d(yyRF_r7$$\"3))******HXaEJF-$!3UlN+*z:oh
$F_r7$$\"3*)*****\\'*RRL$F-$!3Fx$exBvDL$F_r7$$\"3%)*****HvJga$F-$!39NZ
id2<*3$F_r7$$\"3;+++8tOcPF-$!39;%p&=7\\$)GF_r7$$\"35+++\\Qk\\RF-$!3Oqh
jsH1>FF_r7$$\"3U+++p0;rTF-$!3W!ozF5nPb#F_r7$$\"3;+++lxGpVF-$!3n\"oa>Xz
IU#F_r7$$\"39+++!oK0e%F-$!3ec-e)G*[)H#F_r7$$\"33+++<5s#y%F-$!3opb(fla7
>#F_r7$$\"\"&F*$!3%3!3AD:7(3#F_r7N7$F($\"3%3!3AD:7(3#F_r7$F/$\"3o,g#f-
/;>#F_r7$F4$\"3U2u)3G0>H#F_r7$F9$\"3e<ZC))[)pT#F_r7$F>$\"3efY8$)\\]eDF
_r7$FC$\"3\\.IUE'=#=FF_r7$FH$\"3Y.Kba$>p)GF_r7$FM$\"3_%e9>5kw3$F_r7$FR
$\"3!G)=aj+'3L$F_r7$FW$\"3*)\\#HM-\")3i$F_r7$Ffn$\"3O>9Nw3*z)RF_r7$F[o
$\"3-4f[uP=&R%F_r7$F`o$\"3l8ItG/<.]F_r7$$!3y******\\Ow!R#F-$\"3@@FbQY[
/aF_r7$Feo$\"3f3J^Y118fF_r7$Fjo$\"3O$3yD\"))>xlF_r7$F_p$\"39Sa(Q2^yi(F
_r7$Fdp$\"3o3F>2le)*zF_r7$Fip$\"3B,qN\\@8-&)F_r7$F^q$\"3CQtkUrck))F_r7
$Fcq$\"3')R1aGG*Q\\*F_rFgq7$F[r$!3!\\j^Hpu>-\"F-7$Far$!3+ioVr%>X3\"F-7
$Ffr$!3o4B$zY**o9\"F-7$F[s$!3a\"\\*oiyR#>\"F-7$F`s$!3I*G1]'o'\\E\"F-7$
Fes$!3l_A***GhbK\"F-7$Fjs$!3w_$)p'eud`\"F-7$F_t$!3bZz<Wae3<F-7$Fdt$!3A
uCa<ieb=F-7$Fit$!3')3%4N'\\]$*>F-7$F^u$!3s[/uk*yPE#F-7$Fcu$!35s(>)\\%G
L^#F-7$Fhu$!3MV'*4]H'[w#F-7$F]v$!3RiTATCo+IF-7$Fbv$!3bEvBxY6PKF-7$Fgv$
!3aeI9\">=!oMF-7$F\\w$!3G$QO<bPxn$F-7$Faw$!3QK?seQy:RF-7$Ffw$!3@KX!)>)
zp7%F-7$F[x$!3[u>9^Po]VF-7$F`x$!35VCS^bfjXF-7$Fex$!3Y>zZZyG\"z%F--%&CO
LORG6)%$RGBG$\"#5!\"\"$F*FcalFdalFdalFaalFdal-%+AXESLABELSG6$Q\"r6\"Q!
Fial-%*THICKNESSG6#\"\"$-%%VIEWG6$;$!#]Fcal$\"#]Fcal;$!1MqPh$RH)\\!#:$
\"1OqPh$RH)\\Fjbl-%%FONTG6$%*HELVETICAGFbal" 1 2 2 0 10 3 2 6 1 4 2 
1.0 45.0 45.0 1 0 "Curve 1" }}}}{EXCHG {PARA 200 "" 0 "" {TEXT 201 12 
"Number 3.2.3" }}}{EXCHG {PARA 200 "> " 0 "" {MPLTEXT 1 202 55 "plot(1
 - 1/r,r=-5..5,y=-5..5,thickness=3,discont=true);" }}{PARA 201 "" 1 ""
 {GLPLOT2D 400 400 400 {PLOTDATA 2 "6&-%'CURVESG6&7gn7$$!\"&\"\"!$\"3%
**************>\"!#<7$$!3eQYQHU,\"*[F-$\"3ZU#)RrlX/7F-7$$!3Wgf6$H'='z%
F-$\"3CyRU!**)\\37F-7$$!3[\"eP5OU&*o%F-$\"3I&H%pB/C87F-7$$!3A$G_P_\">#
e%F-$\"3J(eOc=O#=7F-7$$!3KJwD14NvWF-$\"33nImlhWB7F-7$$!3Qu!*GxfHwVF-$
\"3=;5USP]G7F-7$$!3eRv#eLIPF%F-$\"3V&='QAw)RB\"F-7$$!3'HN1F!olnTF-$\"3
e?Nr\")H%*R7F-7$$!3'G:^([M#>1%F-$\"3WU>M&y)=Y7F-7$$!3%f+FzpjJ&RF-$\"3G
:Ee]>'HD\"F-7$$!3uI>?]!ot&QF-$\"3%zf4P7W#f7F-7$$!3A]4+S[_\\PF-$\"3a)4/
,Y+nE\"F-7$$!3NAv@:)Q7k$F-$\"3]$QC#3=ju7F-7$$!3))HiUl^)o`$F-$\"3/1[,`Y
t#G\"F-7$$!3*GUdT0A@W$F-$\"3a\"=#\\g%=0H\"F-7$$!3<aW<\\&R%HLF-$\"3iN]T
]3N+8F-7$$!3$yOloo#)RB$F-$\"3**4+J]i@48F-7$$!3w7\"HJmVH7$F-$\"3@-qa22@
?8F-7$$!3uASG7`lCIF-$\"3)[+0\\=;1L\"F-7$$!39l8a8u\"o\"HF-$\"3RESKB%RGM
\"F-7$$!3ARn\\K-89GF-$\"3uijN\"e\\`N\"F-7$$!36f$p;$p)pq#F-$\"3'3]*H<WT
p8F-7$$!3<T6*\\$ff3EF-$\"3+%[zn)zM$Q\"F-7$$!3jI<\"H&zY-DF-$\"3i\\.'p^0
'*R\"F-7$$!310sD13B#R#F-$\"3K'e^b')>!=9F-7$$!3'>YKg/piH#F-$\"3v1\"Q*Q!
*[N9F-7$$!3#4TJgrFE>#F-$\"3SuK<vP2c9F-7$$!3+)))G33cb3#F-$\"3KOiyC%)[z9
F-7$$!3?&Q)yut!3)>F-$\"3hk/0ZY%[]\"F-7$$!3q%3;chd%z=F-$\"3#=:!f'Ro?`\"
F-7$$!31[hr()f#pw\"F-$\"3#o>6>mafc\"F-7$$!336<+:8\"em\"F-$\"3rY=r%33.g
\"F-7$$!3Y+VQ>)\\yb\"F-$\"3c#3]&*R5>k\"F-7$$!3uD;7e1-g9F-$\"3#3p<c\"=#
\\o\"F-7$$!3[kQzWv1`8F-$\"3Z$QrWSh!R<F-7$$!3#yY.-+LCD\"F-$\"3i15w/fW)z
\"F-7$$!33=0e/4CZ6F-$\"3Gt6P2llr=F-7$$!3zSXu.kRW5F-$\"3mFpl\\3\\d>F-7$
$!3-]a,DuFn$*!#=$\"3!)o-Z[gan?F-7$$!3nfg+]-II$)Fiw$\"3!3+EI#pV+AF-7$$!
3e$)pi98%)psFiw$\"3AhV0VeavBF-7$$!3N**pk9N;=iFiw$\"3KzvHo=>3EF-7$$!3gJ
k\\R3y^_Fiw$\"3fZ\\G9g6/HF-7$$!3>L\\aPs>WTFiw$\"3cORajD,8MF-7$$!3KX&f.
EhN:$Fiw$\"3c5g)>:=5<%F-7$$!3#pKb&*oOt4#Fiw$\"3Au-e$o^zw&F-7$$!3?ni\"o
%e'=f\"Fiw$\"3W%e#e&RO>G(F-7$$!3Y2s2/]R'3\"Fiw$\"3k-z>9bZ?5!#;7$$!3#e0
z0yiz9)!#>$\"3OI0%zk+tK\"Fiz7$$!3/PgQ?b(>V&F][l$\"3O'yS*e3&4%>Fiz7$$!3
mF&*G!*=)R2%F][l$\"3k@xi%*4gaDFiz7$$!3g=I>g#))fr#F][l$\"3o%oh+/,>y$Fiz
7$$!3\"RwW^W\"*p.#F][l$\"3NIDC%y+#4]Fiz7$$!3Q4l4IY*zN\"F][l$\"3i8`%)o$
*zjuFiz7$$!3/#QsDA'\\=5F][l$\"3ZdpV[nR=**Fiz7$$!3!pa#[]\"y**y'!#?$\"3S
Q!f#*yeF[\"!#:7$$!3Ut7CvS*\\R$Fa]l$\"3siv[SK^bHFd]l7$$!3-+++++++5!#D$
\"*,+++\"F*7gn7$$\"3-+++++++5F]^l$!)********F*7$$\"3sb+tJ`\"eS$Fa]l$!3
k*)3N'\\ah#HFd]l7$$\"3]6,Yj1i6oFa]l$!3]:%HMSz!e9Fd]l7$$\"3p;!>&*fU<-\"
F][l$!3M8aK73?(o*Fiz7$$\"3IA?pKJKi8F][l$!3]pQH0CSSsFiz7$$\"3cL!Q!*>%[V
?F][l$!3srj*3!Gg$z%Fiz7$$\"3XWSQl_kCFF][l$!3Q;^o\\D?qNFiz7$$\"3Cmg2)Rn
p3%F][l$!39U?8**>!oM#Fiz7$$\"3s)3o2`*G\\aF][l$!3p)G-;h,^t\"Fiz7$$\"3-L
@:'zLR<)F][l$!3$*RqB\\6SB6Fiz7$$\"3!yh`h!y&)*3\"Fiw$!3[,5\"***)3b<)F-7
$$\"3I0q\\([(*Rc\"Fiw$!3?w63k@(QR&F-7$$\"3k#RS)or8Q?Fiw$!3#e\"fU86W1RF
-7$$\"3l!=C'*[wX5$Fiw$!3N7nfb70@AF-7$$\"3QkrZi[3yTFiw$!3oY`-$4TMR\"F-7
$$\"31&oBu.\"\\Y_Fiw$!3+3DJ#\\e.1*Fiw7$$\"3Q`#4rKSqB'Fiw$!3xb?9*pXK.'F
iw7$$\"3)ogC<u'pisFiw$!3u$>tQ;!**oPFiw7$$\"3qpk$H2KMK)Fiw$!38!)QcvZF9?
Fiw7$$\"3up%)[7cw!Q*Fiw$!3DW)[!Gr5,mF][l7$$\"3+%*H27j$o/\"F-$\"3MX$Q'>
<3uWF][l7$$\"3Up!)zf>jU6F-$\"35!*pV-cF[7Fiw7$$\"3u\\!***p^Z]7F-$\"3Rvh
SK*RI+#Fiw7$$\"3exCy%>h(e8F-$\"3jJFcC]NSEFiw7$$\"3GqPdW[6j9F-$\"3KYc3H
lElJFiw7$$\"3ExD%e&z(yb\"F-$\"3A!H*QQ>,\"e$Fiw7$$\"3wXb#3Yg0n\"F-$\"3C
ru<')\\)R,%Fiw7$$\"37KY8Bt,m<F-$\"3=kR=)QTvL%Fiw7$$\"3=()3(oMcq(=F-$\"
3Os6CB%4Dn%Fiw7$$\"3?xfr(pW`(>F-$\"3WWIB0CfP\\Fiw7$$\"3![jekf#=$3#F-$
\"3u(f5rn_'*>&Fiw7$$\"3sgK]x(pe=#F-$\"3g&*[Vb?;DaFiw7$$\"3#3kI$yI,$H#F
-$\"3W*=Ho(e#*QcFiw7$$\"3we)3]2/9R#F-$\"31%3])4iN=eFiw7$$\"3Ip#)3d?`(
\\#F-$\"3e>VT*QZg*fFiw7$$\"3'[zUP?pxg#F-$\"3m*p@&=[IlhFiw7$$\"3)z`nR'4
t.FF-$\"3&*=.JarS,jFiw7$$\"3,*eoRHst!GF-$\"3*f]#)3<]zV'Fiw7$$\"3&>6r\"
HRW9HF-$\"3A:!)4GP\")olFiw7$$\"3u9;@NE>>IF-$\"3-v=bbi&yo'Fiw7$$\"3B:RQ
%RU07$F-$\"3#[Ul9*)Gaz'Fiw7$$\"3)=&QGAS2LKF-$\"3\\q')*eVop!pFiw7$$\"3&
))G)*\\p)=MLF-$\"3<s`+G'p2+(Fiw7$$\"3\\*p:1>]@W$F-$\"3cO%HB9R[4(Fiw7$$
\"3?u$y=Nz*RNF-$\"3s1z*fwC^<(Fiw7$$\"3YNh?lC$pk$F-$\"3'e1%*R^pzD(Fiw7$
$\"37Klz4qcZPF-$\"391it$3-;L(Fiw7$$\"3'=[>a5fF&QF-$\"30w\")4+vX/uFiw7$
$\"39faD1OgbRF-$\"3C<ZLA3%>Z(Fiw7$$\"3%\\X)\\nAFjSF-$\"3;_dlz$H*QvFiw7
$$\"3'RR**\\)*pp;%F-$\"3<>Ak)pu,g(Fiw7$$\"3e,t`ye,tUF-$\"3q<e)QaK(fwFi
w7$$\"3++``eO=yVF-$\"3O2s%R!y%fr(Fiw7$$\"3yc.0E>#[Z%F-$\"3m&y5>?u_w(Fi
w7$$\"3i1bC'G!e&e%F-$\"3m@u#z\"4D>yFiw7$$\"3SXS'R)Qk%o%F-$\"37Uj.CgOly
Fiw7$$\"3CnW/TjE!z%F-$\"3H.s*QSLC\"zFiw7$$\"3=zAf40O\"*[F-$\"3c'e<&H!z
b&zFiw7$$\"\"&F*$\"3U+++++++!)Fiw-%*THICKNESSG6#\"\"$-%&COLORG6&%$RGBG
$\"#5!\"\"$F*FbamFcam-%+AXESLABELSG6$Q\"r6\"Q\"yFham-%%VIEWG6$;$!#]Fba
m$\"#]FbamF]bm-%%FONTG6$%*HELVETICAGFaam" 1 2 2 0 10 1 2 6 1 4 2 1.0 
45.0 45.0 1 0 "Curve 1" }}}}{EXCHG {PARA 200 "> " 0 "" }}{EXCHG {PARA 
200 "" 0 "" {TEXT 201 13 "Number 3.4.4 " }}}{EXCHG {PARA 200 "> " 0 ""
 {MPLTEXT 1 202 55 "plot([sqrt(-1*(r+1)), -1* sqrt(-1*(r+1))],r=-5..5,
thick" }{MPLTEXT 1 202 8 "ness=3);" }}{PARA 201 "" 1 "" {GLPLOT2D 400 
400 400 {PLOTDATA 2 "6'-%'CURVESG6%7?7$$!\"&\"\"!$\"\"#F*7$$!35+++e%G?
y%!#<$\"3%4*Rm-QuW>F07$$!3w*****fesBf%F0$\"3I0qBIbN&*=F07$$!3!******4s
%3zVF0$\"3[k*e6pG#Q=F07$$!3?+++YIQkTF0$\"3%z))pUGr)y<F07$$!31+++6=q]RF
0$\"3$[&Hm'pgxr\"F07$$!3'******>&>f_PF0$\"3mK*\\Sr$4f;F07$$!3!*******o
1YZNF0$\"3sp'[)[m2'f\"F07$$!3#)*****>g8`L$F0$\"3`ruD*Gt\"G:F07$$!3:+++
%*o%Q7$F0$\"3?Rn%zSUtX\"F07$$!37+++#RFj!HF0$\"3-xP$Q:)p!Q\"F07$$!3@+++
'4OZr#F0$\"3#p(*yCKz%48F07$$!3?+++v'\\!*\\#F0$\"3+6hOToNC7F07$$!3%)***
**\\ixCG#F0$\"3#[pVkGlC8\"F07$$!3#******\\KqP2#F0$\"3\\cc/'*)Gi.\"F07$
$!3))*****H5WU)=F0$\"3+'y^cXDMS*!#=7$$!31+++#4z)e;F0$\"3q&\\)>hn8<\")F
cp7$$!3-+++IAUj:F0$\"3^%[R?oXh](Fcp7$$!3#******pOlzY\"F0$\"3D%\\e'>%*z
SoFcp7$$!3/+++Vj#pN\"F0$\"3!e![v%GJV(fFcp7$$!3%*******=t)eC\"F0$\"3Ep!
HGk-(e\\Fcp7$$!31+++o*)fZ6F0$\"3P5F\\66'=%QFcp7$$!3%******ph5$\\5F0$\"
3%Rpi5S*f?AFcp7$$!3,+++!)3$e.\"F0$\"3k#>/jk/H*=Fcp7$$!3*******>9^B-\"F
0$\"3?o#yC$)H]\\\"Fcp7$$!31+++u7h:5F0$\"3;V!p$R3X\\7Fcp7$$!30+++09()35
F0$\"3:`&f&>O\")=%*!#>7$$!3/+++O:8-5F0$\"3<M.8tg&oh%F[t7$I*undefinedGI
*protectedGFctFbt7?7$F($!\"#F*7$F.$!3%4*Rm-QuW>F07$F4$!3I0qBIbN&*=F07$
F9$!3[k*e6pG#Q=F07$F>$!3%z))pUGr)y<F07$FC$!3$[&Hm'pgxr\"F07$FH$!3mK*
\\Sr$4f;F07$FM$!3sp'[)[m2'f\"F07$FR$!3`ruD*Gt\"G:F07$FW$!3?Rn%zSUtX\"F
07$Ffn$!3-xP$Q:)p!Q\"F07$F[o$!3#p(*yCKz%48F07$F`o$!3+6hOToNC7F07$Feo$!
3#[pVkGlC8\"F07$Fjo$!3\\cc/'*)Gi.\"F07$F_p$!3+'y^cXDMS*Fcp7$Fep$!3q&
\\)>hn8<\")Fcp7$Fjp$!3^%[R?oXh](Fcp7$F_q$!3D%\\e'>%*zSoFcp7$Fdq$!3!e![
v%GJV(fFcp7$Fiq$!3Ep!HGk-(e\\Fcp7$F^r$!3P5F\\66'=%QFcp7$Fcr$!3%Rpi5S*f
?AFcp7$Fhr$!3k#>/jk/H*=Fcp7$F]s$!3?o#yC$)H]\\\"Fcp7$Fbs$!3;V!p$R3X\\7F
cp7$Fgs$!3:`&f&>O\")=%*F[t7$F]t$!3<M.8tg&oh%F[tFat-%&COLORG6)%$RGBG$\"
#5!\"\"$F*F_zF`zF`zF]zF`z-%+AXESLABELSG6$Q\"r6\"Q!Fez-%*THICKNESSG6#\"
\"$-%%VIEWG6$;$!#]F_z$\"#]F_z;$!$3#Fgt$\"$3#Fgt-%%FONTG6$%*HELVETICAGF
^z" 1 2 2 0 10 3 2 6 1 4 2 1.0 45.0 45.0 1 0 "Curve 1" }}}}{EXCHG 
{PARA 200 "> " 0 "" {MPLTEXT 1 202 30 "f:=(x,r)->x + (r*x)/(1 + x^2);"
 }}{PARA 202 "" 1 "" {XPPMATH 20 "6#>I\"fG6\"f*6$I\"xGF%I\"rGF%F%6$I)o
peratorGF%I&arrowGF%F%,&9$\"\"\"*(9%F/F.F/,&F/F/*$F.\"\"#F/!\"\"F/F%F%
F%" }{TEXT 203 1 " " }}}{EXCHG {PARA 200 "> " 0 "" {MPLTEXT 1 202 36 "
plot(f(x,-2),x = -3..3,thickness=2);" }}{PARA 201 "" 1 "" {GLPLOT2D 
400 400 400 {PLOTDATA 2 "6'-%'CURVESG6$7Y7$$!\"$\"\"!$!3!*************
*R#!#<7$$!3!******\\2<#pGF-$!3!RE$=HOmZAF-7$$!3#)***\\7bBav#F-$!3*G^;j
_dS6#F-7$$!36++]K3XFEF-$!3[M[K'znD'>F-7$$!3%)****\\F)H')\\#F-$!3&e$)pj
'3q3=F-7$$!3#****\\i3@/P#F-$!3Ap!H.NiTl\"F-7$$!3;++Dr^b^AF-$!3-bk3B3j4
:F-7$$!3$****\\7Sw%G@F-$!3#)zdHp6ue8F-7$$!3*****\\7;)=,?F-$!3b1stuKZ,7
F-7$$!3/++DO\"3V(=F-$!3.tK_)e(oV5F-7$$!3#******\\V'zV<F-$!3S!y+#yL22))
!#=7$$!3******\\d;%)G;F-$!3/tkaH?*3P(Fjn7$$!3!******\\!)H%*\\\"F-$!31'
[6'e%z@w&Fjn7$$!3/+++vl[p8F-$!3'eGhkdP'pTFjn7$$!3\"******\\>iUC\"F-$!3
[%4(>S[wwEFjn7$$!3-++DhkaI6F-$!3%)pr%*oIF!Q\"Fjn7$$!3s******\\XF`**Fjn
$\"3A.SONvdhY!#?7$$!3u*******>#z2))Fjn$\"3Z]w+Eg;76Fjn7$$!3S++]7RKvuFj
n$\"3J'fp@rtd6#Fjn7$$!3s,+++P'eH'Fjn$\"3)=HXW@]:s#Fjn7$$!3A++D1j$)[cFj
n$\"3Inw#pB))e\"HFjn7$$!3q)***\\7*3=+&Fjn$\"3Ur/!G=F***HFjn7$$!3g)****
\\#eo&Q%Fjn$\"3Kn*y%4VtqHFjn7$$!3[)***\\PFcpPFjn$\"3Yjam>#o:$GFjn7$$!3
K)**\\7$HqEJFjn$\"3ibs?!f(zpDFjn7$$!3;)****\\7VQ[#Fjn$\"3oV8]cB<&>#Fjn
7$$!32)***\\i6:.8Fjn$\"3/5l=Q*H'f7Fjn7$$!3Wb+++v`hHFip$\"33Nf\"4b&[hHF
ip7$$\"3]****\\(QIKH\"Fjn$!3)=S#=4[o]7Fjn7$$\"38****\\7:xWCFjn$!3!\\7$
4X+,p@Fjn7$$\"3?++v$\\>m1$Fjn$!3x(R$4V*=%RDFjn7$$\"3E,++vuY)o$Fjn$!3#)
*)*\\mNR]!GFjn7$$\"3e****\\(G(*3L%Fjn$!3/a1Fad$G'HFjn7$$\"3!z******4FL
(\\Fjn$!3Qxs:xm'4+$Fjn7$$\"30)***\\P$>=g&Fjn$!3FY&p#=_\"e#HFjn7$$\"3A)
****\\d6.B'Fjn$!3=yS!*)H(*fu#Fjn7$$\"3s****\\(o3lW(Fjn$!3Z?!37sWS8#Fjn
7$$\"35*****\\A))oz)Fjn$!3s1:>l4^@6Fjn7$$\"3e******Hk-,5F-$\"3h4u%)Qi&
p-\"Fip7$$\"36+++D-eI6F-$\"3/$z)H**ok!Q\"Fjn7$$\"3u***\\(=_(zC\"F-$\"3
1R/%oT%>?FFjn7$$\"3M+++b*=jP\"F-$\"3)>.$pW**[_UFjn7$$\"3g***\\(3/3(
\\\"F-$\"3\"GM6=?IJt&Fjn7$$\"33++vB4JB;F-$\"3/w)o;w*)=I(Fjn7$$\"3u****
*\\KCnu\"F-$\"3\")4')*f0rO%))Fjn7$$\"3s***\\(=n#f(=F-$\"3%HJ'fKbqX5F-7
$$\"3P+++!)RO+?F-$\"3i9&f4L^/?\"F-7$$\"30++]_!>w7#F-$\"3Os%z%oeod8F-7$
$\"3O++v)Q?QD#F-$\"3N$ffKH'R7:F-7$$\"3G+++5jypBF-$\"3'yrDqq$R`;F-7$$\"
3<++]Ujp-DF-$\"3gW+Q([zN\"=F-7$$\"3++++gEd@EF-$\"3%)R[E8rdb>F-7$$\"39+
+v3'>$[FF-$\"3BqE:3Ho0@F-7$$\"37++D6EjpGF-$\"3i(GKbn\\\"[AF-7$$\"\"$F*
$\"3!**************R#F--%&COLORG6&%$RGBG$\"#5!\"\"$F*F^]lF_]l-%+AXESLA
BELSG6$Q\"x6\"Q!Fd]l-%*THICKNESSG6#\"\"#-%%VIEWG6$;$!#IF^]l$\"#IF^]l;$
!%'\\#F)$\"%'\\#F)-%%FONTG6$%*HELVETICAGF]]l" 1 2 2 0 10 2 2 6 1 4 2 
1.0 45.0 45.0 1 0 "Curve 1" }}}}{EXCHG {PARA 200 "> " 0 "" }}{PARA 
203 "" 0 "" }}{VIEWOPTS 1 1 0 1 1 1803 1 1 1 1 }{PAGENUMBERS 0 1 2 33 
1 1 }