What does SL stand for?

Ten chapters discuss the skew field of quaternions; elements of the geometry of S3, Hopf bundles, and spin representations; internal variables of singularity free vector fields in a Euclidean space; isomorphism classes, Chern classes, and homotopy classes of singularity free vector fields in 3-space; Heisenberg algebras, Heisenberg groups, Minkowski metrics, Jordan algebras, and special linear groups; the Heisenbreg group and natural C*-algebras of a vector field in 3-space; the Schrodinger representation and the metaplectic representation; the Heisenberg group as a basic geometric background of signal analysis and geometric optics; quantization of quadratic polynomials; and field theoretic Weyl quantization of a vector field in 3-space.

Sumitomo also unveiled a small, ultrahigh-precision machine that uses a special linear electromagnetic clamp to prevent breakage of thin cores and pins.

By adapting the M1 Wave with a special linear probe, Marposs integrates a wireless electronic gage with a sweep gage, depth gage or virtually any other mechanical device to enhance data acquisition and recording procedures and to improve gage reliability and operator convenience.

The guide-ways are designed with special linear recirculating bearings in hardened, ground tracks.

The guideways are designed with special linear recirculating bearings in hardened, ground tracks.