Leonhard Euler
Mathematician and physicist, Euler's Formula
A prominent mathematician and physicist, contributions included advancements in calculus, graph theory, and topology. Introduced the concept of a mathematical function. Developed Euler's formula that establishes a profound connection between complex analysis and trigonometry. Published over 800 papers and books, making significant contributions to various fields of mathematics and mechanics. His work laid the groundwork for modern mathematics, influencing future generations of mathematicians and scientists.
Introduced Euler's formula in complex analysis
Developed foundational principles in calculus
Contributed to graph theory and topology
Other People Born on April 15th
John Lloyd
Scottish journalist and author
Born
April 15th, 1946 80 years ago
Contributed significantly to journalism and literature in Scotland. Worked as an editor for several prominent publications and authored several books highlighting topics of national interest. Served as a key figure in various media-related organizations, shaping discussions around media ethics and freedom of expression. Collaborated with other journalists to investigate pressing societal issues, contributing to the broader discourse on these matters.
Continue ReadingCristina Husmark Pehrsson
Swedish Minister for Social Security
Born
April 15th, 1947 79 years ago
A Swedish nurse and politician served as Swedish Minister for Social Security from 2006 to 2014. Focused on social welfare, health, and security policies. Contributed to the shaping of social security legislation during tenure. Engaged in various political discussions and reforms aimed at improving social systems in Sweden.
Continue ReadingPete Rouse
White House Chief of Staff
Born
April 15th, 1946 80 years ago
Served as a senior adviser and White House Chief of Staff under President Barack Obama. Rouse played a significant role in the Obama administration, providing strategic guidance and support on various policy initiatives. Previously worked as chief of staff to Senator Tom Daschle, managing legislative strategies and party leadership responsibilities. Continued involvement in Democratic Party politics and advocacy through various roles after leaving the White House.
Continue ReadingWalt Hazzard
Basketball player and coach, NCAA champion
Born
April 15th, 1942 84 years ago
Died
2011 15 years ago — 69 years old
A prominent basketball player and coach, made significant contributions to the sport in both capacities. Played college basketball at UCLA under coach John Wooden, contributing to the team's success during the 1960s. Won an NCAA championship in 1964. After a successful collegiate career, transitioned to professional basketball, playing for teams including the Philadelphia 76ers and the Los Angeles Lakers in the NBA. Later took on coaching roles, impacting younger generations of players through various positions. Hazzard was respected for his basketball intelligence and leadership on and off the court.
Continue ReadingPatrick Carney
Drummer and producer in rock music
Born
April 15th, 1980 46 years ago
A prominent drummer and musician, associated with the rock band The Black Keys, which achieved significant commercial success. The work with The Black Keys led to several Grammy Awards, showcasing skill in both music production and instrumental performance. In addition to band projects, produced music for various artists and contributed to notable collaborations.
Continue ReadingDavid Omand
English civil servant and academic
Born
April 15th, 1947 79 years ago
A civil servant and academic, contributions included serving as Director of GCHQ from 1997 to 2002. Played a role in the development of national security strategies and intelligence policies. Later, involved in academic pursuits, focusing on security studies and the implications of technology on governance. Engaged in multiple think tanks and academic institutions, contributing to discussions on intelligence and security.
Continue ReadingOther People Who Died on September 18th
Alan Watt
Diplomat and Ambassador to Japan
Born
April 13th, 1901 125 years ago
Died
September 18th, 1988 38 years ago — 87 years old
A public servant and diplomat served as Australian Ambassador to Japan. Played a key role in strengthening bilateral relations between Australia and Japan during a critical period in post-war history. Worked to promote trade, cultural exchange, and mutual understanding between the two nations. Contributed to various diplomatic initiatives that fostered cooperation in the Asia-Pacific region.
Continue ReadingJolidee Matongo
Politician, 97th Mayor of Johannesburg
Born
1975 51 years ago
Died
September 18th, 2021 5 years ago — 46 years old
Served as the 97th Mayor of Johannesburg from 2021 until death in September 2021. Before becoming mayor, held positions within the African National Congress and local government structures, contributing to various community initiatives and governance reforms. Participated actively in addressing issues such as housing, urban development, and social services during tenure. Worked on enhancing the delivery of basic services to residents in Johannesburg. His term was marked by a commitment to improve living conditions in the city.
Continue ReadingLouis VII
King of France during the Crusades
Born
1120 906 years ago
Died
September 18th, 1180 846 years ago — 60 years old
A monarch of the Capetian dynasty, held the throne from 1137 until 1180. Led the French during the Second Crusade from 1147 to 1149. Experienced conflicts with rival factions, notably the Plantagenets and struggled to strengthen royal authority. His marriage to Eleanor of Aquitaine initially expanded French territory, but the union ended in annulment in 1152, leading to significant territorial losses. His reign also witnessed efforts to reorganize the kingdom's administration and secure his legacy.
Continue ReadingEdward J. King
American politician, Governor of Massachusetts
Born
May 11th, 1925 101 years ago
Died
September 18th, 2006 20 years ago — 81 years old
Served as the 66th Governor of Massachusetts from 1979 to 1981. King was the first Democratic governor of Massachusetts in 20 years. His administration focused on issues such as education reform, fiscal policy, and urban development. King faced challenges dealing with a struggling economy and rising unemployment during his tenure. After leaving office, he continued to be active in politics and public service.
Continue ReadingStanisław Ignacy Witkiewicz
Polish author and painter
Born
February 24th, 1885 141 years ago
Died
September 18th, 1939 87 years ago — 54 years old
An author, poet, and painter, contributed significantly to the development of Polish theatre and literature in the early 20th century. Established a unique style characterized by the integration of visual arts and dramatic literature. Developed a psychological and philosophical system, particularly through his plays which explored themes of existentialism and identity. Active in the avant-garde movement, Witkiewicz's work often challenged societal norms and traditional artistic expressions. His artistic contributions are marked by a deep engagement with complex human emotions and the absurdities of life.
Continue ReadingMauricio Kagel
Composer and scholar of contemporary music
Born
December 24th, 1931 94 years ago
Died
September 18th, 2008 18 years ago — 76 years old
Born in Argentina and later moving to Germany, this composer contributed significantly to the avant-garde music scene. He studied musicology, performance, and composition, blending elements of theater and music in innovative ways. Some compositions incorporated multimedia elements, exploring the relationship between sound and visual art. This composer was a professor at various institutions, influencing future generations of musicians and composers. Notable works include 'Zwei Augen' and 'Transición,' showcasing a unique approach to contemporary classical music.
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