Template:Are You Sure/April 7: Difference between revisions
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• ... that | • ... that April 7 is '''[[Abuse of notation (nonfiction)|National Abuse of Notation Day]]''' in the United States; and that while Canada does not have an official Abuse of Notation Day, the phrase "Every Day is Abuse of Notation Day" is often attributed to the mathematician-comedians of [[New Minneapolis, Canada]] ? | ||
• ... that computer scientist '''[[Donald Sarason (nonfiction)|Donald Sarason]]''' pioneered the abstract treatment of contractive containment and established a fruitful connection between the spaces Hb and the ranges of certain Toeplitz operators? | • ... that computer scientist '''[[Donald Sarason (nonfiction)|Donald Sarason]]''' pioneered the abstract treatment of contractive containment and established a fruitful connection between the spaces Hb and the ranges of certain Toeplitz operators? | ||
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• ... that physicist '''[[Ernst Ruhmer (nonfiction)|Ernst Ruhmer]]''' (15 April 1878 — 8 April 1913) investigated practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmission, sound-on-film audio recording, and television transmission over wires? | • ... that physicist '''[[Ernst Ruhmer (nonfiction)|Ernst Ruhmer]]''' (15 April 1878 — 8 April 1913) investigated practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmission, sound-on-film audio recording, and television transmission over wires? | ||
• ... that physicist and academic '''[[Pieter Rijke (nonfiction)|Petrus Leonardus Rijke]]''' explored the physics of electricity, and is known for the Rijke tube, which turns heat into sound by creating a self-amplifying standing wave? | • ... that physicist and academic '''[[Pieter Rijke (nonfiction)|Petrus Leonardus Rijke]]''' (11 July 1812 – 7 April 1899) explored the physics of electricity, and is known for the Rijke tube, which turns heat into sound by creating a self-amplifying standing wave? | ||
Revision as of 05:10, 7 April 2021
• ... that April 7 is National Abuse of Notation Day in the United States; and that while Canada does not have an official Abuse of Notation Day, the phrase "Every Day is Abuse of Notation Day" is often attributed to the mathematician-comedians of New Minneapolis, Canada ?
• ... that computer scientist Donald Sarason pioneered the abstract treatment of contractive containment and established a fruitful connection between the spaces Hb and the ranges of certain Toeplitz operators?
• ... that physicist Ernst Ruhmer (15 April 1878 — 8 April 1913) investigated practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmission, sound-on-film audio recording, and television transmission over wires?
• ... that physicist and academic Petrus Leonardus Rijke (11 July 1812 – 7 April 1899) explored the physics of electricity, and is known for the Rijke tube, which turns heat into sound by creating a self-amplifying standing wave?