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Dahlgren system and dahlgrenogram, created by Swedish-Danish botanist Rolf M. T. Dahlgren (1932–1987) USS Dahlgren (TB-9) , Torpedo Boat No. 9/TB-9/Coast Torpedo Boat No. 4 6945 Dahlgren (1980 FZ3), Main-belt Asteroid discovered on March 16, 1980 by Lagerkvist, C.-
One of the modern systems of plant taxonomy, the Dahlgren system was published by monocot specialist Rolf Dahlgren in 1975 [1] and revised in 1977, [2] and 1980. [3] However, he is best known for his two treatises on monocotyledons in 1982 [ 4 ] and revised in 1985. [ 5 ]
The Whitehead problem was the first purely algebraic problem to be proved undecidable. Shelah later showed that the Whitehead problem remains undecidable even if one assumes the continuum hypothesis. [3] [4] In fact, it remains undecidable even under the generalised continuum hypothesis. [5] The Whitehead conjecture is true if all sets are ...
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Madeleine Vinton Dahlgren (pen names, Corinne and Cornelia; July 13, 1825 – May 28, 1898) was an American writer, translator, and anti-suffragist. [1] Her volume, Idealities ( Philadelphia , 1859) was her first work in book form.
Move over, Wordle and Connections—there's a new NYT word game in town! The New York Times' recent game, "Strands," is becoming more and more popular as another daily activity fans can find on ...
The transtheoretical model is also known by the abbreviation "TTM" [2] and sometimes by the term "stages of change", [3] although this latter term is a synecdoche since the stages of change are only one part of the model along with processes of change, levels of change, etc. [1] [4] Several self-help books—Changing for Good (1994), [5 ...