His first wife,
Margaret Jones, whom he met in the early 1950s when they were both graduate students at Washington University in St. Louis, became a well-known author. They had two sons, Eric (born 1957), and David (1959–2019).[5] During the 1960s, Mark and Margaret Bolsterli divorced. In 1971, he met Judith "Judy" Costlow (born 1946) when they were skiing in the
Santa Fe Ski Basin. They married and over the years of their marriage they "skied, hiked, and bicycled in many parts of the world."[1] Mark and Judy Costlow in 1976 bicycled from
Missoula, Montana to
Yellowstone National Park and then to
Jackson Hole, Wyoming. In 2007 the couple went on a bicycle tour from
Bariloche,
Argentina to
Puerto Montt,
Chile.[6]
In 1981, they spent 8 months in Switzerland, the home of his father, where he worked at the Scientific Lab
CERN. In 1992, he worked for the
National Science Foundation in Washington DC overseeing grants in the physics field. He played the piano, spoke 6 languages, played squash most days in his healthy years, studied ancient Greek, read voraciously, loved classical music, opera, the Lensic Performing Arts Center where he ushered for almost 10 years, and crossword puzzles he did in ink.[1]
Mark Bolsterli died in 2019, aged 81, from complications of Parkinson's disease. He was survived by his wife, two sons, and extended family.[where?][1]
——; Norton, J. L. (1971). "Separable Approximations to Matrices and Functions of Two Variables". Journal of Mathematical Physics. 12 (6): 969–970.
Bibcode:
1971JMP....12..969B.
doi:
10.1063/1.1665690. 1971
Britt, H. C.; ——; Nix, J. R.; Norton, J. L. (1973). "Fission Barriers Deduced from the Analysis of Fission Isomer Results". Physical Review C. 7 (2): 801–823.
Bibcode:
1973PhRvC...7..801B.
doi:
10.1103/PhysRevC.7.801.