, ▁lecture ▁notes ▁in ▁Comput ational ▁Science ▁and ▁Engineering , ▁vol ▁ 1 1 1 , ▁ 2 0 1 6 . ▁▁ ▁A . ▁T ve ito ▁and ▁R . ▁Win ther . ▁Introduction ▁to ▁partial ▁differential ▁equations . ▁A ▁computational ▁approach . ▁Springer - Verlag ▁Berlin - He idel berg , ▁ 2 nd ▁ed . ▁ 2 0 0 9 . ▁( also ▁available ▁in ▁German ). ▁ ▁A . ▁T ve ito , ▁H . ▁P . ▁Lang t angen , ▁B . ▁F . ▁N iel sen , ▁and ▁X . ▁C ai , ▁Element s ▁of ▁Scient ific ▁Comput ing . ▁Springer - Verlag ▁Berlin - He idel berg , ▁ 2 0 1 0 . ▁ ▁References ▁▁ ▁Category : 1 9 6 1 ▁birth s ▁Category : L iving ▁people ▁Category : Univers ity ▁of ▁Os lo ▁al umn i ▁Category : Univers ity ▁of ▁Os lo ▁fac ulty ▁Category : N or weg ian ▁mathemat icians ▁Category : N or weg ian ▁computer ▁scient ists ▁Category : M embers ▁of ▁the ▁Norwegian ▁Academy ▁of ▁Techn ological ▁Sciences <0x0A> </s> ▁Lake ▁George ▁is ▁a ▁mid ▁ 1 9 th ▁century ▁painting ▁by ▁American ▁artist ▁John ▁Frederick ▁K ens ett . ▁Done ▁in ▁oil ▁on ▁canvas , ▁the ▁painting ▁dep ict s ▁Lake ▁George ▁in ▁up state ▁New ▁York . ▁The ▁painting ▁is ▁in ▁the ▁collection ▁of ▁the ▁Metropolitan ▁Museum ▁of ▁Art . ▁ ▁Description ▁ ▁K ens ett ▁frequently ▁visited ▁Lake ▁George ▁in ▁the ▁Ad