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During the early years at Imperial College he met his wife Inga-Lisa, who provided him with unshakable support throughout all the difficult moments of his life. John was also fortunate to see his son Holger follow a successful career in engineering and bring into the world, with his wife Carina, two adorable grandchildren who brightened his final years.

John, in accordance with Herakleitos’s aphorism of “everything flows,” has joined the pantheon of those enlightening personalities who, with their revolutionary ideas and contributions, changed the scientific world in the 20th century. His geometrical spirit, the elegance of his writings, his deep appreciation and understanding of classical ideas, his creativity, and his epochal vision of the future initiated and defined the modern era of engineering analysis and set us all on life’s path of discovery. Our computational mechanics community has lost the most eminent member and for many of us a devoted friend. He will be deeply missed, but his legacy will empower generations.

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