Physical world and mathematics

Erika T. Hamden

Erika T. Hamden is an American astrophysicist who builds far-ultraviolet instruments to study the circumgalactic medium, leading the FIREBall-2 balloon telescope and proposed Eos and Hyperion missions.

Erin Carlson

Erin E. Carlson is an American chemical biologist and bacteriologist at the University of Minnesota, known for chemical probes of bacterial cell-wall synthesis and a 2013 PECASE award.

Erin Johnson

Erin R. Johnson is a Canadian theoretical and computational chemist who holds the Herzberg-Becke Chair at Dalhousie University and works on density-functional theory, London dispersion, and crystal structure prediction.

Erin Wirth Moriarty

Erin Wirth Moriarty, also known as Erin Wirth, is a USGS research geophysicist in Seattle who simulates Cascadia earthquake ground motions and received the 2025 PECASE award.

Sep 20, 2026

Erio Tosatti

Erio Tosatti, born 1943, is an Italian condensed matter theorist who founded and led the condensed matter theory group at SISSA in Trieste and won the 2018 Enrico Fermi Prize.

Eriochrome Black T

Eriochrome Black T (EBT) is an azo dye used as a metallochromic indicator, most notably in EDTA complexometric titrations of water hardness, changing from red to blue at the endpoint.

Eris (dwarf planet)

Eris is a dwarf planet in the scattered disk beyond Neptune and the most massive known. Its 2005 discovery led the IAU to reclassify Pluto in 2006.

Erkenntnis

Erkenntnis, German for "knowledge," is a peer-reviewed philosophy journal founded in 1930 by Hans Reichenbach and Rudolf Carnap as the organ of logical empiricism, revived in 1975.

Erlang distribution

The Erlang distribution is a continuous probability distribution for the sum of k independent exponential random variables, modeling the waiting time until the k-th event of a Poisson process.

Erlangen program

The Erlangen program is a research program in geometry set out by Felix Klein at the University of Erlangen in 1872, defining each geometry by the transformations under which its properties stay invariant.

Erlenmeyer flask

The Erlenmeyer flask, also called a conical flask or titration flask, is a flat-bottomed laboratory flask with a conical body and narrow neck, used for mixing, heating, and titration.

Erlotinib

Erlotinib, sold as Tarceva, is an oral EGFR inhibitor approved by the FDA in 2004 for non-small cell lung cancer and, with gemcitabine, for pancreatic cancer.

Ernest Barnes

Ernest William Barnes was an English mathematician and Anglican clergyman, elected a Fellow of the Royal Society in 1909, who served as Bishop of Birmingham from 1924 to 1953.

Ernest Courant

Ernest Courant (1920–2020) was an American physicist at Brookhaven National Laboratory who co-invented strong focusing, the principle behind the LHC and nearly all modern particle accelerators.

Ernest Fox Nichols

Ernest Fox Nichols was an American experimental physicist who made the first precise measurement of the pressure of light at Dartmouth, and served as president of Dartmouth College and MIT.

Ernest Grunwald

Ernest Grunwald (1923–2002) was a German-born American physical organic chemist who co-developed the Grunwald–Winstein equation, making solvent effects on reaction rates predictable, and taught at Brandeis University.

Ernest Harry Vestine

Ernest Harry Vestine (1906–1968) was a Canadian-American geophysicist who showed that Earth's magnetic field arises from fluid circulation in the core, working at the Carnegie Institution and RAND.

Ernest Julius Wilczynski

Ernest Julius Wilczynski (1876–1932) was an American mathematician and professor at the University of Chicago who founded projective differential geometry, publishing its landmark 1906 treatise and directing 25 doctoral students.

Ernest L. Eliel

Ernest L. Eliel (1921–2008) was a German-born American organic chemist who shaped modern stereochemistry and conformational analysis, taught at Notre Dame and UNC Chapel Hill, and won the 1996 Priestley Medal.

Ernest Lawrence

Ernest Orlando Lawrence (1901–1958) was an American physicist at the University of California, Berkeley, who invented the cyclotron and won the 1939 Nobel Prize in Physics.

Ernest M. Henley

Ernest M. Henley (1924–2017) was a German-born American nuclear physicist at the University of Washington, known for studies of parity, isospin, and time-reversal symmetries of nuclear forces.

Ernest Ma

Ernest Ma is an American theoretical high-energy physicist, professor emeritus at UC Riverside, whose 1998 paper classified the three seesaw mechanisms that give neutrinos their tiny masses.

Ernest Marsden

Ernest Marsden was a British-born New Zealand physicist who detected alpha-particle backscattering in 1909, leading Rutherford to the nuclear atom, and later founded New Zealand's DSIR.

Ernest Merritt

Ernest George Merritt (1865–1948) was an American physicist at Cornell University who co-founded The Physical Review, served as the American Physical Society's first secretary, and later became its president.

Ernest O. Wollan

Ernest O. Wollan (died 1984) was an American physicist who established neutron diffraction as a practical crystal-analysis method at Oak Ridge, after developing the film-badge dosimeter for the Manhattan Project.

Ernest R. Davidson

Ernest R. Davidson, born 1936, is an American theoretical and computational quantum chemist known for the Davidson correction and Davidson method, who received the National Medal of Science in 2001.

Ernest Rutherford

Ernest Rutherford, also known as Lord Rutherford, was a New Zealand-born physicist who discovered the atomic nucleus and won the 1908 Nobel Prize in Chemistry.

Ernest T.S. Walton

Ernest T.S. Walton (Ernest Thomas Sinton Walton) was an Irish physicist who split the atomic nucleus with John Cockcroft, winning the 1951 Nobel Prize in Physics.

Ernest William Brown

Ernest William Brown (1866–1938) was a British-born mathematician and astronomer who spent his career in the United States and became the leading authority on the Moon's motion.