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Laboratory routes to the solvent-free materials are numerous. A well documented route involves the thermal decomposition of diazonium salts of [BF 4] −: [11] [PhN 2] + [BF 4] − → PhF + BF 3 + N 2. It forms by treatment of a mixture boron trioxide and sodium tetrafluoroborate with sulfuric acid: [12] 6 Na[BF 4] + B 2 O 3 + 6 H 2 SO 4 → 8 ...
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The acidity of fluoroboric acid is complicated by the fact that its name refers to a range of different compounds, e.g. [H(CH 3 CH 2) 2 O] + [BF 4] − (dimethyloxonium tetrafluoroborate), [H 3 O] + [BF 4] − (oxonium tetrafluoroborate), and HF·BF 3 (hydrogen fluoride-boron trifluoride 1:1 adduct) – each with a different acidity.
In other words, Digital Geometry is programmable CAD. Historically the CAD term has been used for any 3D model representations. In many situations Computer Aided Design term becomes misleading. In traditional CAD 3D model is the objective. In Digital Geometry 3D objects are an intermediate step for calculations or simulations.
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Upload file; Search. Search. Appearance. ... Download as PDF; Printable version ... Appearance. move to sidebar hide. BF3 may refer to: Boron trifluoride, a chemical ...
CGAL is an opensource Computational Geometry Algorithms Library which has support for boolean operations on Polyhedra; but no sweep, revolve or NURBS. Open CASCADE is an opensource modeling kernel. sgCore is a freeware proprietary modeling kernel distributed as an SDK. [9] K3 kernel [10] is developed by Center GeoS.
Copies of the original 1980 notes were circulated by Princeton University. Later the Geometry Center at the University of Minnesota sold a loosely bound copy of the notes. In 2002, Sheila Newbery typed the notes in TeX and made a PDF file of the notes available, which can be downloaded from MSRI using the links below.