Packages modified in this release:

• CLHEP v1.6.8
  Faster HepSymMatrix::invert() for 6x6, 5x5 and 4x4 matrices.

• ErrorLogger v2.0.8

CLHEP v1.6.8, cvs rtag V01-06-08

In the Matrix sub-package:
Improved invert() for HepSymMatrix
Significant speed improvements for inversion of 6x6, 5x5, and 4x4 symmetric matrices. This involves a mix of inversion based on Cholesky decomposition (which is very fast for positive definite matrices) and Haywood's determinant-based techniques (which are better than the general case inversion for matrices of these sizes).

ErrorLogger v2.0.8; cvs rtag V02-00-08

Improved treatement of char[ ] items passed to ErrorLog
Operator << to an ErrorLog (similarly to an ErrorObj) is generally implemented by a template. This had the consequence that if a job passed char[ ] items of 25 different lengths to errlog, 25 realizations of the template code would be created.
We have rectified this annoyance by supplying a non-templated operator << (char[ ]).
Dependencies:
ZMutility v1.2.3 or higher
ISOcxx v1.1 or higher
Coming shortly:
ThreadSafeErrorLog < Mutex >
A templated class (based on a user-supplied mutex mechanism) allowing multiple threads to simultaneously be composing and issuing error messages, without garbling the content of the log destinations.

As of 5/2/2001, the following rtags of ZOOM products exist:

Package	Tag	Version	Unchanged Since	Last Significant Change
Allocator	V01-00-02	v1.0.2	v1.0.1	v1.0
CLHEP	V01-06-08	v1.6.8	v1.6.8	v1.6.8
ErrLogEx	V01-05-04	v1.5.4	v1.5.4	v1.5
ErrorLogger	V02-00-08	v2.0.8	v2.0.8	v1.5
Exceptions	V02-00-02	v2.0.2	v2.0.2	v1.2.8
HepTuple	V02-00-02	v2.0.2	v2.0.1	v1.7.3
ISOcxx	V01-05-01	v1.5.1	v1.5.1	v1.5
LinearAlgebra	V01-03-13	v1.3.13	v1.3.13	v1.3.5
PhysicsVectors	V02-00-03	v2.0.3	v2.0.3	v2.0
SIunits	V01-00-01	v1.0.1 (KITS)	v1.0.1	v1.0.1
ZMtools	V02-00-01	v2.0	v1.5.3	v1.5
SpecialFunctions	V01-02-00	v1.2	v1.2	v1.2
ZMutility	V02-00-00	v2.0	v1.6	v1.5

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