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3-fold is a tautogram (all words start with the same letter). View more tautograms!


3-fold: In algebraic geometry, a 3-fold or threefold is a 3-dimensional algebraic variety.

Printed dictionaries and other books with definitions for 3-fold

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Google previewTopology and Geometry (2002)

Commemorating SISTAG : Singapore International Symposium in Topology and Geometry, (SISTAG) July 2-6, 2001, National University of Singapore, Singapore by A. Jon Berrick, Man Chun Leung, Xingwang Xu

and generalises them to indecomposable Gorenstein Fano 3-folds (see below for explanation). DEFINITION 2.1. A nonsingular Fano 3-fold is a nonsingular irreducible projective variety of dimension 3 with ample –Ky. Likewise, a Gorenstein ...

Google previewQuasiconformal Mappings and Analysis (2012)

A Collection of Papers Honoring F.W. Gehring by Peter Duren, Juha Heinonen, Brad Osgood, Bruce Palka

hyperbolic 3-fold is a topological invariant. Because...

Google previewA Theory of Generalized Donaldson-Thomas Invariants (2012)

by Dominic D. Joyce, Yinan Song

4, a Calabi–Yau 3-fold is a smooth projective 3-fold X over K, with trivial canonical bundle KX. Fix a very ample line bundle OX (1) on X, and let (τ, G,⩽) ...

Google previewConcise Encyclopedia Chemistry (1994)

by Mary Eagleson

Crystallographic symmetry operations Symmetry operation Symmetry element Hermann- Mauguin symbol || 2-fold rotation 3-fold rotation 4-fold rotation 6-fold rotation Inversion (reflection through a point) Reflection 3-fold rotary inversion ...

Google previewEncyclopedia of toxicology (2005)

Dib-L] by Philip Wexler, Bruce D. Anderson

malate dehydrogenase (2–3-fold), phosphoglucose isomerase (2–3-fold), glutathione ...

Google previewEncyclopedia of Cancer (2011)

by Manfred Schwab

5- to 3-fold in overweight and obese individuals. The > incidence rates of adenocarcinoma of the esophagus and gastric cardia have been rapidly increasing in developed countries over the last ...

Google previewConcise Dictionary of Materials Science (2002)

Structure and Characterization of Polycrystalline Materials by Vladimir Novikov

two perpendicular mirror planes; tetragonal, a single 4-fold axis or a rotationinversion axis; rhombohedral, a single 3-fold axis or a rotation-inversion axis; hexagonal, a single 6-fold axis or a rotation-inversion axis; and cubic, four 3 -fold axes.

Google previewThe Facts on File Dictionary of Earth Science (2009)

by Jacqueline Smith

triad hexadaxisofrotationsymmetry (3-fold), tetrad(4-fold), and hexad (6-fold) planesof Fig.1 axes respectively(fig.2). of sym- symmetry Fig.2 metry – a central point aboutwhichevery ...

Google previewA Dictionary of Geology and Earth Sciences (2013)

by Michael Allaby

3-fold (triad), 4-fold (tetrad), and 6 -fold (hexad) axes. The centre of symmetry is a central point which is present when all faces or edges occur in parallel pairs on opposite sides of the crystal.

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Quotes about 3-fold

The safest way to double your money is to fold over once and put it in your pocket. (Kin Hubbard)
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