Herbert Robbins Created 2026-10-14 Updated 2026-10-24
James Joseph Sylvester Created 2026-10-18 Updated 2026-10-24
Figure 1. . Alfred Edward Emslie (1848–1918), painted portrait dated 1889; reproduction sourced to Oxford Dictionary of National Biography, article 26872. PD-Art: original public domain in origin/life-plus-100-or-shorter jurisdictions; File also states pre-1931 United States publication. Source usage terms, via Wikimedia Commons. Source.
James R. Norris 2026-10-24
Figure 1.
James R. Norris at Oberwolfach in 2007. Photograph credited to Renate Schmid; Wikimedia Commons and the Oberwolfach Photo Collection.
Photograph by Renate Schmid. Verified file and source credit, licensed CC BY-SA 2.0 Germany. No changes. Source.
Figure 1. . Renate Schmid; copyright Mathematisches Forschungsinstitut Oberwolfach, 2005. CC BY-SA 2.0, via Wikimedia Commons. Source.
Johan Jensen Created 2026-10-13 Updated 2026-10-24
Figure 1.
Portrait of Johan Jensen
. Theodor Vilhelm Rieger; Royal Danish Library, Copenhagen, object166670; photograph dated 1902–1913. Public domain under Commons PD-Denmark50 and PD-US templates. Source and usage information on the linked Wikimedia file page. Source.
Johann Jakob Balmer Created 2026-10-18 Updated 2026-10-24
Figure 1. . F. Brandseph, photograph circa 1865; Basel University Library, UBH Portr BS Balmer JJ 1825, 2c/2b/2a; contributed with Wikimedia CH. Public domain in Switzerland under expired-term rule and in life-plus-70 jurisdictions; library declares document public domain. Source usage terms, via Wikimedia Commons. Source.
John Edensor Littlewood Created 2026-10-14 Updated 2026-10-24
Figure 1. . Photograph identified on the named portrait page.
John Forbes Nash Jr. 2026-10-24
Figure 1.
Portrait of John Nash at the 2005 Warwick Economics Summit
. Photograph by Wikimedia user Videesha; the file page records the author's release into the public domain. The upload date is 2006 and is distinct from the stated event date. Source.
John Joseph O'Connor 2026-10-18
John Joseph O'Connor is a mathematician and a creator of the MacTutor history archive.[ref]
Figure 1.
Portrait of John Joseph O'Connor
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John von Neumann 2026-10-24
A mathematician whose work includes the minimax theorem and, with Oskar Morgenstern, the foundations of expected utility and game theory.
Figure 1.
Portrait of John von Neumann
. Portrait credited to wikispaces in the Wikimedia Commons file record. CC BY-SA 3.0. Source.
Karl Heun Created 2026-10-14 Updated 2026-10-31
Figure 1.
Portrait of Karl Heun
. Historical portrait hosted by Wikimedia Commons; attribution and licensing are recorded on the source page. Source.