17 December (Bulgaria ) within release Bulgarian Scientists (2021) goes into circulation Stamp Nikola Obreshkov, Mathematician face value 0.65 Bulgarian lev
Stamp Nikola Obreshkov, Mathematician in catalogues | |
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Colnect codes: | Col: BG 2021-34A |
Stamp is square format.
Also in the issue Bulgarian Scientists (2021):
Stamp Nikola Obreshkov, Mathematician it reflects the thematic directions:
One of the earliest known mathematicians was Thales of Miletus (c. 624 – c. 546 BC); he has been hailed as the first true mathematician and the first known individual to whom a mathematical discovery has been attributed.He is credited with the first use of deductive reasoning applied to geometry, by deriving four corollaries to Thales's theorem.