Leonhard Euler
Mathematician and physicist, Euler's Formula

Born
April 15th, 1707
318 years ago
Died
September 18th, 1783
241 years ago — 76 years old
Category
Scientists & Innovators
Country
Switzerland
Links & References
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
Kenneth Lay
Born in 1942, a prominent American businessman served as the CEO and chairman of Enron Corporation, an energy company based in Houston, Texas. Lay played a crucial role in the company's rapid growth in the 1990s, promoting innovative energy trading and deregulation. Under his leadership, Enron's stock skyrocketed, making it one of the largest companies in the United States. However, amid accounting scandals, Enron filed for bankruptcy in 2001, marking one of the largest bankruptcies in U.S. history. Lay faced criminal charges related to securities fraud and conspiracy, though he died before the trial concluded.
Continue ReadingClaudia Cardinale
Born in Tunisia, this Italian actress gained prominence in the 1960s and 1970s with roles in classic films. Notable works include performances in 'The Leopard,' directed by Luchino Visconti, and 'Once Upon a Time in the West,' directed by Sergio Leone. Over her career, she collaborated with several renowned filmmakers and worked across various film genres, earning recognition for her contributions to cinema.
Continue ReadingAlex Crawford
A Nigerian-South African journalist, this individual has covered numerous global conflicts and events, bringing attention to issues in areas such as Afghanistan, Libya, and Syria. Important work includes reporting on the fall of Gaddafi in Libya. This journalist has garnered several awards for excellence in journalism throughout a career marked by frontline reporting and in-depth investigations.
Continue ReadingDavid Hamilton
Born in 1933, a photographer and film director with roots in England and France. Established a reputation for a distinctive style characterized by soft-focus and ethereal imagery. Directed several films, with a notable focus on themes of youth and beauty. Achieved recognition for works that blended photography and cinematic storytelling, influencing subsequent generations of visual artists. The portfolio includes iconic models and themes that resonate with the aesthetic of the 1970s.
Continue ReadingÉtienne Geoffroy Saint-Hilaire
A prominent figure in the field of biology, contributions included the development of a theory of morphological unity among animals. Pioneered the study of comparative anatomy and established connections among various species. A founding member of the Société Zoologique de France, significant engagements included work on the classification of organisms and the impact of environment on biological development. Collaborated with notable contemporaries in scientific advancements.
Continue ReadingMott Green
Founded a bean-to-bar chocolate company, specializing in sustainably sourced chocolate products. Established the company in 2006, focusing on eco-friendly practices and fair trade. Helped bring attention to ethical sourcing in the chocolate industry and emphasized the importance of sustainability in business.
Continue ReadingOther People Who Died on September 18th
Américo Tomás
Served as the 14th President of Portugal from 1958 to 1974. Held the rank of Admiral in the Portuguese Navy and was involved in various naval operations. His presidency coincided with a period of political turmoil in Portugal leading up to the Carnation Revolution, which ultimately resulted in his resignation. Was a prominent figure during the Estado Novo regime and played a significant role in maintaining the government's authority during his term.
Continue ReadingJimmy Witherspoon
Born in 1920, this American jump blues singer gained recognition in the 1940s and 1950s. With a powerful voice and emotive delivery, this artist blended genres and influenced later musicians. Career highlights included performances at major venues and recordings that showcased a unique vocal style. A notable collaboration with prominent jazz musicians helped solidify a place in the music world. The singer's music addressed themes of love, heartache, and everyday life.
Continue ReadingFairfield Porter
A major figure in American art, emphasized figurative painting amidst the rise of abstraction. Pioneered a unique style that combined realism with an emphasis on color and light. Contributed to art criticism through essays and reviews, shaping public perception of contemporary art. Played a significant role in the movements within the 20th-century art scene, especially in the context of New York City's vibrant artistic community.
Continue ReadingErnie Coombs
A television host, known for creating and starring in the children's show 'Mr. Dressup', which aired on CBC Television from 1967 to 1996. The program featured interactive storytelling, puppetry, and arts and crafts, engaging a generation of Canadian children. Coombs utilized various characters, including the iconic puppets Casey and Finnegan, to teach important values and stimulate creativity. His work significantly shaped children's programming in Canada during his active years.
Continue ReadingSeán O'Casey
An influential Irish playwright and memoirist, work spanned the early 20th century. His plays often centered on themes of social issues and the Irish experience, showcasing the struggles and aspirations of ordinary people. Notable works include 'The Shadow of a Gunman', 'Juno and the Paycock', and 'The Plough and the Stars', which defined the Irish Theatre and highlighted the turbulent times of Ireland's fight for independence. O'Casey was also known for his autobiographical writing, where he chronicled his early life in Dublin and the impact of historical events on personal narrative.
Continue ReadingAndré Dacier
A prominent French scholar and academic, contributed significantly to the fields of literature and criticism. Engaged with classical texts and philosophies, publishing comprehensive analyses that influenced contemporary thought. Served as a member of the French Academy, which solidified his position within the literary community. Focused on the works of prominent authors, enhancing the understanding and appreciation of their contributions through detailed commentary.
Continue Reading