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{{Short description|Unanswered conjecture in number theory}} | conjecture date = 1923 ...

|birth_date = {{birth date|1923|8|10}} |death_date = {{death date and age|2001|3|12|1923|8|10}} ...

...The "dryness fraction", ''x'', gives the fraction by mass of gaseous water in the wet region, the remainder being droplets of liquid.]] ...me <math>V</math> using the relationship <math>H = U + pV \,\!</math> (or, in terms of [[specific enthalpy]], [[specific entropy]] and [[specific volume] ...

{{Short description|Rule in atomic physics}} ...e book|last=Morris|first=Christopher G.|title=Academic Press dictionary of science and technology|url=https://archive.org/details/academicpressdic00morr|url-a ...

|birth_date = {{birth date|1923|11|30|df=y}} |death_date = {{Death date and age|2011|3|7|1923|11|30|df=y}} ...

In [[corrosion]] of metals, the '''Pilling–Bedworth ratio''' ('''P–B ratio''') ...udged whether the metal is likely to [[Passivation (chemistry)|passivate]] in dry air by creation of a protective oxide layer. ...

...b>c</sub>). The method is named after [[Aksel Lydersen]] who published it in 1955.<ref>{{cite journal |last=Lydersen |first=a.L. |title=Estimation of Cr The Lydersen method is based in case of the critical temperature on the [[Guldberg rule]] which establishes ...

...n fluid dynamics were done by the Russian scientist [[Ippolit S. Gromeka]] in 1881.<ref>Gromeka, I. "Some cases of incompressible fluid motion." Scientif ...ltrami flow is that it can never be a planar or axisymmetric flow because in those flows, vorticity is always perpendicular to the velocity field. The o ...

...and [[John August Anderson]] in the 1920s to record local [[earthquakes]] in [[southern California]]. It photographically records the horizontal motion. ...in Pasadena.<ref name=Geschwind>{{cite book|title=California Earthquakes: Science, Risk, and the Politics of Hazard Mitigation|url=https://archive.org/detail ...

...de <math>\mathbb{P}^n</math>'',{{r|cv|idref}} and a doctorate from Cornell in 2008 with the dissertation ''A New Link between Teichmüller Theory and Comp ...became an associate professor in 2016, and was promoted to full professor in 2021,{{r|cv}} at the same time being named as the Arthur F. Thurnau Profess ...

{{short description|Predicts density vs depth in Earth}} ...duction to the Physics of the Earth's Interior |series = Cambridge Topics in Mineral Physics & Chemistry |publisher = [[Cambridge University Press]] | ...

...cist [[William Duane (physicist)|William Duane]] presented<ref name="Duane 1923"/> a discrete momentum-exchange model of the reflection of [[X-ray]] photon In effect, the observed scattering patterns are reproduced by a model where th ...

{{Short description|French mathematician and physicist (1923–2025)}} | alt = smiling mathematician Yvonne in 1974 ...

| birth_date = {{Birth date|1923|06|05|df=y}}<ref name="biobib">See {{harvtxt|Kurosh|Vityushkov|Boltyanskii| | death_date = {{Death-date and age|January 2006|5 June 1923}} ...

...ter [[Václav Chvátal]] and [[David Sankoff]], who began investigating them in the mid-1970s.<ref name="cs75">{{citation ...–Sankoff constant" to refer to <math>\gamma_2</math>, the constant defined in this way for the binary alphabet.<ref name="ks09">{{citation ...

...n 1993 he joined the faculty of [[Ohio University]], from which he retired in 2011. ...his first year, Arhangelskii told Alexandrov that he wanted to specialize in [[topology]].<ref name=int1/> ...

...deposit" in ancient Greek) can only be used to describe secondary deposits in [[cave]]s and does not include secondary deposits outside the cave environm ...=Lees1992>Lees, T P, (1992). "Deterioration Mechanisms". 10–36 [Chapter 2] in Mays, G C (Ed.), Durability of Concrete Structures Investigation, repair, p ...

{{Short description|Problem book in mathematical analysis}} ...cal analysis|analysis]] by [[George Pólya]] and [[Gábor Szegő]]. Published in 1925, the two volumes are titled (I) ''Series. Integral Calculus. Theory of ...

{{About|the mathematical concept|number words denoting a position in a sequence ("first", "second", "third", etc.)|Ordinal numeral}} In [[set theory]], an '''ordinal number''', or '''ordinal''', is a generalizat ...

...0042-207x(93)90123-r | pages=681–684| bibcode=1993Vacuu..44..681C }}</ref> In general, molecular drag pumps are more efficient for heavy gasses, so the l The [[turbomolecular pump]] invented in the 1950s, is a more advanced version based on similar operation, and a Hol ...