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∇ · (εE) = ̺,
2Q=Q8<!"." !"&;"., &.
∇·
*")& "#*$B".?") "9E
$# !""-" .$ 0"-*,)*̺
$# !""-" .$ !,.?"*")#$ := D!"1, ".$,- &"R $")ε
$# !""-" .$ ;".1$ $B$ :,)*,##(1"* &@";$" "<$#" &)# ,) !.&(?!&( !$# !"#$#=5') /6 7'80%-.17 5-,."%' 6+.+3+#"0 1+ .+% "*'0%4 F# $ <$-- @" ,;;,.4
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$#<.$ "),#
∇ · (µH) = 0,
2Q=N8!"#"
H
$% &!"'()*"&$ ,"-. (*.&!" '(&"#$(- /"0 $"*&µ
$%&!"'()*"&$ 1"#2 '"(3$-$&45 67%&(%ε
8$&$%(%%7'".&/3"1$" " $%" /*%&(*&&!#/7)!/7&&!"&!"%$%55$($1$6789$: "#$%&$% '#%$()& *(+,-&++ .(#)(#$(+( ).& *(+,/ 9!$%1#$*2
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"-" &#$ (-)"*"#(&/#%5 =*.$>"#"*&$(-</#'8$&$%'(&!"'(&$ (--4</#'7-(&".(%
∇ × E = −µ
∂H
∂t
,
?@5AB!"#"
∇×
$%&!" 7#-?/##/&(&$/*B/1"#(&/#(*.∂
∂t
."*/&"%&!"1(#&$(-&$'"."#$:(2 &$:"5;2%<('78 9$: 0+( ).& 1..($) %($(.#)(2 # '#%$()& *(+,/ 9!" '/%& /3:$/7%
(11-$ (&$/*/<&!$%1#$* $1-"$%&!" (4"-" &#/'()*"&%/1"#(&"5 9!"
'(&!"'(&$ (-</#'#"(.%
∇ × H = J,
?@5CB!"#"
J
$% &!" "-" &#$ 7##"*& ."*%$&45 =*)"*"#(-8 &!" 7##"*&."*%$&4 &(;"%&!" </#'J
= σE + J
s
8 !"#"σ
$% &!""-" &#$ /*.7 &$:$&4 (*.J
s
$% &!" ."*%$&4 /< &!""D&"#*(-%/7# " 7##"*&5!"!" #$%& '( )*) ,-'.$/0),1&. &10 ) 2$3%)**
E(D "--#"(-$%".&!(&&!"-(%&/<&!"(3/:"1!4%$ (--( %$%*/& /'1-"&"5 =*%&"(.8
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*(+,#$, "#$%&$%(+( ).& *(+,#+23 %($(.#)(2#'#%$()& *(+,/ E(&!"'(&$ (--48$&
&(;"%&!"</#'
∇ × H = J + ε
∂E
∂t
.
?@5JB9!" %$)*$, (* " /< E(D "--H% /##" &$/* -$"%$* &!" <( & &!(& ?@5AB (*. ?@5J B */
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%$'7-&(*"/7%%/-7&$/*/<?@5AB(*.?@5J B8
ε
∂E
∂t
= ∇ × H − J,
µ
∂H
!"#$ %&# (!")%)(! %&*% %&#%+( !,!(+! -#."/ /*%)/0123435 *!" 2346 5*% )!)%)*. %)7#4 8// 7)!9*/)! /()"*.+*:#/(. %)(!;234<5 *!*./(=#+$)%%#!*/
iωεE = ∇ × H − J,
iωµH = −∇ × E,
234>5 +&#$#ω
)/ %&#%#7?($*.0$#@ #! 1;i
2
= −1
*!"*..-#."/ "#?#!"/(.#.1 (!/?* #4A/)!9 /%$*)9&%0($+*$" / =/%)% %)(!/; =(%& 234< 5 *!" 234>5 *! =# #B?$#//#" */ *
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ε
∂
2
E
∂t
2
+ ∇ ×
¡
µ
−1
∇ × E
¢
= −
∂J
∂t
,
234E5∇ ×
¡
µ
−1
∇ × E
¢
− εω
2
E
= −iωJ.
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#@ *%)(!/)! %&#R B0($7
Q(x)
∂q
∂t
+ ∇ · F (q) = 0,
2343S5+&#$#
Q(x)
$#?$#/#!%/ %*%#$)*. ?$(?#$%)#/;q
)/ %&# :# %($ (0 %&# -#." :*. #/ *!"F
(q) = [F
1
(q), F
2
(q), F
3
(q)]
T
"#!(%#/%&#R B4 T*7#.1;Q(x) = diag (ε
r
, ε
r
, ε
r
, µ
r
, µ
r
, µ
r
) ,
q
=
·
E
H
¸
,
F
i
(q) =
·
−e
i
× H
e
i
× E
¸
,
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!+3-# *" "#% 4"+*3 <" &'" +<F#$+#%6 Z %!&*&F,! +#+(43-3 &5%!" $-30"*3-&# +#$
$-33-0+%-&#<"!+/-&F*&5 %!":H '"%!&$ 5&*%!"%*+#30&*% "MF+%-&#>3 +(+* (-#"+*
"*/+%-&# (+.E.+3 ,-/"# -# AR ℄8.!- ! +(3&0*&/-$"$ + 0*&&5 5&*"+*(-"* &#[" 2
%F*"38"30" -+((45*&'ANC ℄6 !"3"'-2$-3 *"%"343%"'5&*%!".+/""MF+%-&#!+3+(3&
<""#"1%"#3-/"(43%F$-"$ AO 8BK 8PR ℄6 L#0+*%- F(+*8%!"+F%!&*3-# AO ℄0*&/-$"$ %.&
$-\"*"#%$-30"*3-&#+#+(43"35&*%!"3"'-2$-3 *"%".+/""MF+%-&#&#%"#3&*0*&$F %
"("'"#%36 T#" 5&* %!" -#%"*-&* 0"#+(%4 :H '"%!&$ >LY2:HE &5 %!"3" &#$2&*$"*
.+/""MF+%-&#+#$+#&%!"*5&*%!","#"*+(:H'"%!&$5&*+I*3%&*$"*343%"'6
!" #&/"(%4&5 %!-3 !+0%"* .-%! *",+*$3 %&%!" $-30"*3-&# +#$$-33-0+%-&#<"2
!+/-&F*&5 :H'"%!&$3(-"3-# -# (F$-#, %!"%-'"-#%",*+%-&# -# %!"+#+(43-36 U"
-$"* %!" $-3 *"%-3+%-&#&5 %!" I*3%2&*$"*343%"' *"(+%"$ %& %!"]+1."(( "MF+2
%-ſ&&F*3 !"'"5+((3-# %!" +%",&*4 &5.!+% %!"+F%!&*3 +(( %!"^,"#"*+(:H
!" $!%&' ()*+$, -($)!*).,-$%* %'/!0! '%!*"'",0' 1*2 (-)!*- 3*,$ .%*%&$
$"%$)$, *) 3!4$, 5-4$ 2*) %!3$6,$($",$"% ()*/0$3 789 ℄; <" ='+$6()*('>'%!*"
()*/0$3 !%! *2%$"3*)$',+'"%'>$*- %*1"*=%&$ *"+$)>$" $)'%$*2%&$,! ($)6
!*"'",,! !('%!*"$))*) %&'"%&'%*2%&$$))*)!"%&$
L
2
6"*)3; ?&$ $ *"+$)>$" $ )'%$ &'+$/$$"$ %'/0! &$,!"7@ ℄2*)%&$ $3!6,! )$%$%)'" (*)%$A-'%!*"; B*)%&$>$"$)'0CD &$3$E%*=&! &%&$"*,'0CD3$%&*,,! - $,&$)$/$0*"> E!%&'
/$$" &*=" !" 79 ℄ %&'% - !"> F) %6*),$) (*0G"*3!'0 !" %&$ ('%!'0 ,! )$%! '%!*"
)$ -0% !" ' ,! ($) !*"$))*)*2*),$)
O(h
4
)
'",' ,! !('%!*"$))*)*2*),$)
O(h
3
)
2*)%&$ $3!6,! )$%$ G %$3; <"%&! &'(%$)=$ &*=E%&)*->&"-3$)! '0$4'3(0$ E
&*=%&$,! ($) !*"'",,! !('%!*"$))*) *"+$)>$!" %&$2-00G,! )$%$&!>&6*),$)
HICD &$3$2*)%&$0!"$')'-%*"*3*- 2*)3 *2%&$J'4=$00$A-'%!*" ;
?&$ )$3'!"!"> (')% *2 %&! &'(%$) ! *-%0!"$, ' 2*00*= ; <" K$ %!*" L;L =$
)$ '00 %&$ G %$3 *2 %!3$6,*3'!" J'4=$00 $A-'%!*" '", )$,- $ !% %* %&$ 0!"$')
'-%*"*3*- 2*)3; ?&$ ('%!'0,! )$%! '%!*"! /)!$5G)$+!$=$,!" K$ %!*"L;9'",
%&$HI &$3$ 2*)%&$%$3(*)'0,! )$%! '%!*"!"K$ %!*"L;8 ; M"$6,!3$" !*"'0'",
%=*6,!3$" !*"'0 B*-)!$) '"'0G ! ! '))!$, *-%!" K$ %!*" L;N E '", %&$' * !'%$,
"-3$)! '0)$ -0% E'0*">=!%& *3$*%&$) "-3$)! '0%$ % E')$()$ $"%$,!" K$ %!*"
L;O ; P$)$ =$ $4'3!"$ %&$ /$&'+!*-) *2 %&$ ,! ($) !*" '", ,! !('%!*" $))*) !"
%$)3 *2%&$3$ & !Q$ ($)='+$0$">%& '",%&$ !Q$ *2%&$ %!3$ %$(; B!"'00GE=$
-3-(*-) *" 0- !*" !"K$ %!*"L;R ;
! "#$%&'' &()#*+,-.
S$/$>!"=!%&,$)!+!">%&$,!3$" !*"0$ %!3$6,*3'!"2*)3*2%&$J'4=$00$A-'6
%!*" !" %&$ %&)$$6,!3$" !*"'0 ,*3'!"
Ω ⊂ R
3
; T*0,2' $ G3/*0 &$)$ )$2$) %*
+$ %*) F$0, E !;$; F$0, !"
R
3
→ R
3
; S!%&%&$ $ "*%'%!*" %&$J'4=$00$A-'%!*"
)$',
∂D
∂t
= ∇ × H − J,
∂B
∂t
= −∇ × E,
UL;@V∇ · D = ̺,
∇ · B = 0,
UL;LV=!%& &')>$,! %)!/-%!*"
̺(x, t)
E(* !%!*"+$ %*)x
= (x, y, z) ∈ Ω
E%&$"'/0'*($)'6 %*)∇ =
³
∂
∂x
,
∂
∂y
,
∂
∂z
´
'",%!3$
t
; ?&$+$ %*)+'0-$,A-'"%!%!$ ')$%&$$0$ %)! F$0,E(x, t)
E%&$$0$ %)! 5-4 ,$" !%GD(x, t)
E%&$3'>"$%! F$0,H(x, t)
E%&$3'>"$%! 5-4,$" !%GB(x, t)
'",%&$$0$ %)! -))$"%,$" !%GJ
(x, t)
; B*)3'"G'((0! '%!*" !%! )$' *"'/0$%*' -3$%&'%%&$3'%$)!'0 ')$! *%)*(! E0!"$')'",%!3$6!"+')!'"%;?&- %&$ G %$3*2$A-'%!*" ! 0* $,=!%&%&$0!"$') *" %!%-%!+$)$0'%!*"
D
= ε
r
E,
B
= µ
r
H,
UL;9V=&$)$%&$ '0')A-'"%!%!$
ε
r
(x)
'",µ
r
(x)
')$%&$($)3!%%!+!%G'",($)3$'/!0!%GE )$ ($ %!+$0G; B-)%&$)3*)$EM&3W 0'=!"#$#!%"&'($)!) (+' #,%- ('.'(/
σ(x, t)
0 1# #2( ', ($),#,3%'4),"'#, ! 5#+4 #5 ($) 6 7&)!! )8- ('#," 9:0; <=9:0:<> &) ?+"( ',(+#%- ) ('!%)% . +' 2!)" (# +)@+)"),( ($) %'4),"'#, ! ?)!%"0 1$) "@) ' ! ,#( ('#,"ε
˜
0
,%µ
˜
0
"( ,% 5#+ ($) %'4),"'#, ! @)+4'(('.'(/ ,% @)+4) 2'!'(/ #5 . --40 A/-"',B ($),#+4 !'")%"@ ) ,%('4). +' 2!)"x
=
x
˜
˜
L
,
t =
˜
t
˜
L/˜
c
0
,
&'($ +)5)+), )!),B($L
˜
,%%'4),"'#, ! "@))%#5!'B$(', . --4˜
c
0
= 1/
√
˜
ε
0
µ
˜
0
> ($)@$/"' !?)!%" +)4 %),#,3%'4),"'#, !($+#-B$ ($)+)! ('#,"E
=
˜
E
˜
Z
0
H
˜
0
,
H
=
H
˜
˜
H
0
,
J
=
˜
J
˜
H
0
/ ˜
L
.
C)+)Z
˜
0
=
p
˜
µ
0
/˜
ε
0
,%H
˜
0
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ε
r
∂E
∂t
= ∇ × H − J,
µ
r
∂H
∂t
= −∇ × E,
9:0J< ', &$' $ ($) #,"('(-('.) +)! ('#," 9:0E < +) !"# ', !-%)%0 K" 5#+ ($) 2#-,% +/ #,%'('#,">#,)'4@#+( ,("@) ' ! ")'"($ (#5@)+5) ()!) (+' #,%- (#+"9LMH<0 1$)")+) %ˆ
n
× E = 0,
n
ˆ
× H = 0,
9:0N<&'($#-(& +%@#',(',B,#+4 !.) (#+
n
ˆ
0 A)(&)),4 ()+' !',()+5 )">',($) 2"), ) #5"-+5 ) -++),(" ,%"-+5 ) $ +B)>($)5#!!#&',B #,%'('#," +). !'%ˆ
n
× [[E]] = 0,
n
ˆ
· [[ε
r
E]] = 0,
9:0O<ˆ
n
× [[H]] = 0,
n
ˆ
· [[µ
r
H]] = 0,
&$)+)[[u]] = u
+
− u
−
%),#()" ($) F-4@', ($) ?)!% . !-)u
0 1$) )7@+)""'#,"9:0O < +)@+)"),(($) @$/"3 ' ! @+#@)+(/ ($ ( ($)( ,B),(' ! #4@#,),("#5 2#($ ?)!%" +) #,(',-#-" +#"" %'P)+),(4 ()+' !">&$)+) "($),#+4 ! #4@#,),("4 /2)%'" #,(',-#-"0!" #$% '()$(*'*% +,-./0$( 1$% /.)$%,)$'( $( %2, . !"##$%&'(")! )*! +%,-)'%.+ )% )*! /"&0!,, !1-")'%.+ '. +#" ! -+'.3 )*!*'3*4 %$5!$.%5",5'+ %.)'.-%-+6",!$7'.(!)*%5'.)$%5- !5'.89: ℄ ".5<-$)*!$+)-5'!5 '. 89= ℄ ".5 8>? ℄@ A.)*! <%,,%0'.3 0!B$'!CD $!E'!0 )*! ("'. <!")-$!+ %< )*'+ 5'+4 $!)'+")'%.@ ! %.+'5!$ )*! /"&0!,, !1-")'%.+ '. )*!3!.!$", 5%("'.
Ω ⊂ R
3
F,,!50')* .%.4 %.5- )'E!(")!$'",+Gσ = 0
H".5$!0$')!G :@9 H'.)*!C-&<%$(Q(x)
∂q
∂t
+ ∇ · F (q) = 0,
G:@IH 0*!$!Q(x)
$!#$!+!.)+ )*!(")!$'", #$%#!$)'!+Jq
'+ )*! E! )%$ %< )*! F!,5 E",-!+ ".5F
(q) = [F
1
(q), F
2
(q), F
3
(q)]
T
5!.%)!+)*!C-&@ K"(!,DJQ(x) = diag (ε
r
, ε
r
, ε
r
, µ
r
, µ
r
, µ
r
) ,
q
=
·
E
H
¸
,
F
i
(q) =
·
−e
i
× H
e
i
× E
¸
,
0*!$!e
i
'+)*! %$$!+#%.5'.3L"$)!+'".-.')E! )%$@ !+!!7)*!.-(!$' ",+%,-)'%. '.)*! %(#-)")'%.",5%("'.Ω
K
)!++!,,")!5'.)%K
.%.4%E!$,"##'.3!,!(!.)+J'@!@Ω ≈ Ω
K
=
K
[
k=1
Ω
k
.
M!$!Ω
K
$!#$!+!.)+")!)$"*!5$",)!++!,,")'%.'.)*$!!5'(!.+'%.+".5")$'".3-,"$ )!++!,,")'%.'.)0% 5'(!.+'%.+@ N!<%$!<%$(-,")'.3)*!5'+ %.)'.-%-+6",!$7'.5'+ $!)'+")'%.J0!'.)$%5- !)*! +)".5"$5G%$$!<!$!. !H!,!(!.)Ω
st
= T
d
<%$5'O!$!.)+#")'",5'(!.+'%.+d
@ P*!+! "$!5!F.!5 "+T
1
= {ξ : − 1 ≤ ξ ≤ 1}
'.%.!5'(!.+'%.JT
2
= {ξ = (ξ, η) : − 1 ≤ ξ, η, ξ + η ≤ 0}
'.)0%5'(!.+'%.+".5T
3
= {ξ = (ξ, η, ζ) : − 1 ≤ ξ, η, ζ, ξ + η + ζ ≤ −1}
'. )*$!! 5'(!.+'%.+@ Q" * !,!(!.)Ω
k
'+ %.+)$- )!5 BD )*! '.E!$)'B,! ("##'.3X
k
(ξ) : Ω
st
→ Ω
k
J 0*' * '+ -.'1-! <%$ ".D 3'E!. !,!(!.)@ R%$ 5!)"',+ +!! )*! !&)!.+'E!B%%78S: ℄@ !.%05!F.!)*!F.')!!,!(!.)+#" !"+V
h
=
n
q
k
N
∈
¡
L
2
(Ω)
¢
2d
: q
k
N
(X
k
(ξ)) ∈ P
p
d
(Ω
st
), k = 1, . . . , K
o
,
G:@>H 0*!$!L
2
(Ω)
'+)*!+#" !%<+1-"$!'.)!3$"B,! <-. )'%.+%.Ω
".5P
d
p
(Ω
st
)
5!.%)!+ )*!+#" !%<d
45'(!.+'%.", #%,D.%('",+%< ("&'(-(%$5!$p
%. )*!$!<!$!. !!,!4 (!.)Ω
st
@ T'. !)*'+#%,D.%('",+#" !'+"++% '")!50')*N =
(n + d)!
n! d!
!"#$%!& '(
ξ
i
∈ Ω
st
)*+ # !*& '-!". +'/+0.$'&"&0+ (&! #$1#2-# 2+%!$34 !0&#$(L
i
(ξ)
%#((& 2'/-!.2/ '/+(+ !"+(5L
i
(ξ
j
) = δ
ij
,
*&'/δ
ij
=
(
1
&6i = j,
0
&6i 6= j.
7#8& 2'/+1#2-# 2+%!$3 !0&#$(#('-&#$ 6. '&! (# ".(& 2'/+0#%%& 2
X
k
(ξ)
)
*+#%%-!9&0#'+'/+(!$.'&! #''/+
N
!"#$%!& '(*&'/& +# /+$+0+ '#(q
k
(x, t) ≈ q
k
N
(x, t) =
N
X
i=1
q
k
i
(t) (L
i
(x))
2d
∈ P
p
d
(Ω
k
),
*/+-+q
k
N
(x, t)
&('/+: &'+ +$+0+ '#%%-!9&0#'&! )# "q
k
i
(t)
-+%-+(+ '('/+(!$.4 '&! #' !"#$%!& 'x
j
∈ Ω
k
;
7/+ "&('-&<.'&! !6 '/+ !"+( &( # 8+3&((.+ 6!- '/+%-!%+-'&+( !6 '/+& '+-%!4
$#'&! ) +(%+ &#$$3 6!-=+-3 /&2/4!-"+- #%%-!9&0#'&! (; >' &( <+(' 0+#(.-+"<3 '/+
1+<+(2.+ ! ('# '#((! &#'+"*&'/'/+1#2-# 2+%!$3 !0&#$(2!& 2'/-!.2/#%#-4
'& .$#-(+'!6 !"+(; 7/+1+<+(2.+ ! ('# '(/!*(?.('/!* $!(+#2&=+ %!$3 !0&#$
#%%-!9&0#'&! &('!'/+<+('%!$3 !0&#$#%%-!9&0#'&! ; 7/+0!('%!%.$#- /!& +(
6!- !"+( & (%+ '-#$@
hp
+$+0+ '0+'/!"(#-+ '/+A+8+'+ %!& '(BCD ℄# " '/++$+ 4 '-!('#'& %!& '(BFG )HI ℄; >' (/!.$" <+ !'+"'/#' #$'/!.2/ '/+A+8+'+%!& '(/#=+'/+ <+(' & '+-%!$#'&! %-!%+-'&+( J$!*+(' 1+<+(2.+ ! ('# 'K & # '-&# 2$+ 6!-!-4
"+-(
p ≥ 9
) !"&('-&<.'&! 6!-#'+'-#/+"-! /#((!6#-<++ %-!=&"+"; L J#$0!('K !%'&0#$ "&('-&<.'&! !6'/+ +$+ '-!('#'& !"+()/!*+=+-) &(2&=+ 6!- # '-&# 2$+&BFG ℄ # "6!-# '+'-#/+"-! & BHI ℄; M!-+!=+-)'/++$+ '-!('#'& %!& '(#$(!%+-6!-0
($&2/'$3<+''+-6!-!-"+-(
p ≤ 8
& '-&# 2$+(; 7/+"&('-&<.'&! !6'/+(+ !"+(& '/+ ('# "#-" '-&# 2$+ &( (/!* & A&2.-+ N;I 6!- !-"+-(p = 2, 4, 6, 10
; O+ #$(! !'+ '/#' '/+ !"#$"&('-&<.'&! ( & # '-&# 2$+ # "'+'-#/+"-! *&'/ #L
2
4 !-0 !%'&4
0#$1+<+(2.+ ! ('# '*+-+"+'+-0& +"& BID ℄# "BIG ℄; P!*+=+-)'/+(+ !"+()&
! '-#('*&'/'/+A+8+'+# "+$+ '-!('#'& %!& '()"! !'/#=+# +"2+"&('-&<.'&!
*/& / # <+ &"+ '&:+" *&'/ Q#.((41!<#''!4R# !<& %!& '(; O+ -+6+- '! BSN ℄
6!-6.-'/+-!=+-=&+*! !"#$J# "0!"#$K(%+ '-#$@
hp
0+'/!"(;7! 6!-0.$#'+ '/+ "&( ! '& .!.( Q#$+-8& ( /+0+) *+ :-(' & '-!". + '/+ $! #$
& +-%-!". '# "&'(#((! &#'+" !-0!
Ω
k
#((u, v)
Ω
k
=
Z
Ω
k
u
· v dx,
kuk
2
Ω
k
= (u, u)
Ω
k
# "! &'(<!. "#-3∂Ω
k
#((u, v)
∂Ω
k
=
Z
∂Ω
k
u
· v ds.
O+0.$'&%$3JN;CK*&'/'/+$! #$'+(' 6. '&!
φ ∈ P
d
p
(Ω
k
)
) /!(+ '!<+'/+(#0+ & '+-%!$#'& 2 1#2-# 2+ %!$3 !0&#$(L
i
(x)
6!- '/+ '-&#$ <#(&( 6. '&! () "-!% '/+!"#$ $&"'
k
()* &)'#+$('# ,- "($' ./#$ #0#1#)'Ω
k
'. .,'(&) '2# .)'&)!.! 3#(45.$1!0('&.)µ
Q
∂q
∂t
, φ
¶
Ω
k
− (F , ∇φ)
Ω
k
= − (ˆ
n
· F , φ)
∂Ω
k
,
∀Ω
k
⊂ Ω
K
.
6789:;#'2#) $#"0( # '2# .)'&)!.! /($&(,0#