Elementary Numerical Mathematics for Programmers and Engineers

Gisbert Stoyan worked for more than 10 years on industrial problems at the WIAS in Berlin and taught numerical mathematics at ELTE University (Budapest, Hungary) for over 30 years. His research publications were mostly on the numerical solution of partial differential equations. His three-volume textbook Numerical Methods I-III, published in Hungarian, brings together his experiences in areas including (along with the basic topics like numerical linear algebra and nonlinear equations) strongly stable methods for ODEs, multigrid algorithms, finite element praxis and theory, finite elements for Navier-Stokes equations, and methods for first-order hyperbolic equations.

Gisbert Stoyan passed away in 2018.

Agnes Baran received her PhD in Mathematics in 2008 at the University of Debrecen under the supervision of Gisbert Stoyan. Her doctoral thesis was on high-order finite element methods for Stokes equations. She works as an associate professor at the Faculty of Informatics at the University of Debrecen where she teaches courses on Numerical Methods and Optimization for students of Mathematics and Computer Science.

Gisbert Stoyan 在柏林的 WIAS 從事工業問題研究超過 10 年，並在 ELTE 大學（匈牙利布達佩斯）教授數值數學超過 30 年。他的研究出版物主要集中在偏微分方程的數值解法上。他的三卷本教科書《Numerical Methods I-III》以匈牙利文出版，匯集了他在多個領域的經驗，包括（除了數值線性代數和非線性方程等基本主題外）對常微分方程的強穩定方法、多重網格算法、有限元素實務與理論、Navier-Stokes 方程的有限元素，以及一階雙曲方程的方法。

Gisbert Stoyan 於 2018 年去世。

Agnes Baran 於 2008 年在德布勒森大學獲得數學博士學位，指導教授為 Gisbert Stoyan。她的博士論文研究高階有限元素方法在 Stokes 方程中的應用。她目前擔任德布勒森大學資訊學院的副教授，教授數學和計算機科學學生的數值方法與優化課程。