Copyright (C) 2000 Didier Leibovici

  The main References to quote
        check also  http://c3s2i.free.fr/cv/recentpub.html

 Leibovici D and Sabatier R (1998)
   "A Singular Value Decomposition of a k-ways array for a
 Principal Component Analysis of multi-way data, the PTA-k"
                          Linear Algebra and its Applications
                                  269:307-329.
Leibovici D (2002) "PTAk Principal Tensor on k modes: an R Statistical Contributing Package, version 1.1-9". CopyRight (C) 2000 Didier Leibovici;  http://cran.r-project.org/src/contrib/PTAk_1.1-9.tar.gz



Licence definitions for PTAk version 1.1-9 :

i. academic work (Public reasearch institutes)				... licence free
ii.academic work or post-doc research work within commercial cie		... licence free until use of this work
iii. use in a 	process or methodology within commercial cie			... licence A payable every year
iv. any other situation where you need to justify a licence			... licence B payable once
v. to commercialize a methodology involving the package			... licence C  payable every year

Licence Fees are different according to the commercial sector and are agreed multi-user on one site.
The software is licenced without any responsability from his author for its accuracy and proper use.


All licences are per site and so multi-user  (a site is understood as departement or a division at one geographically located  site).

For pharmaceutical companies license fees are :
licence A : 950 per year
licence B : 450 once
licence C : 650 per year (with clear mention of the double copyright to the clients who will need  licence A )

The notification of the licence and its applicabilities will be sent to you soon after your payment.

For other companies these rates can be negociated.

Payements of licences should be made  in GBP to :
Dr D G  Leibovici
 Branch code: 08-93-00   Account number: 13251972   Tran/Code: 77
at
The Cooperative Bank
PO Box 48
1 Balloon Street
Manchester M60 1GP
 (U.K.)

Any published work should mention two references one for the package and one with the main article given in the licence specification :

Leibovici D (2002) "PTAk Principal Tensor on k modes: an R Statistical Contributing Package, version 1.1-7". CopyRight (C) 2000 Didier Leibovici;  http://cran.r-project.org/src/contrib/PTAk_1.1-7.tar.gz

Leibovici D and Sabatier R (1998) "A Singular Value Decomposition of a k-ways array for a Principal Component Analysis of multi-way data, the PTA-k". Linear Algebra and its Applications, 269:307-329.


This package is licenced as it is without any warranty of accuracy and or proper use.

best regards
Dr Didier Leibovici
didier@fmrib.ox.ac.uk
c3s2i@free.fr



History of Changes :
---------------------

Package: PTAk
Version: 1.1-2
Date: 2001/04/17
Title: Principal Tensor Analysis on k modes
Author: Didier Leibovici <didier@fmrib.ox.ac.uk>.
Depends: tensor (useful but not necessary)
Description: A multiway method to decompose a tensor (array) of any order,
             as a generalisation of SVD also supporting \emph{non-identity metrics} and \emph{penalisations}.
             2-way SVD with these extensions is also available. The package includes also some other multiway
             methods: PCAn (Tucker-n) and PARAFAC/CANDECOMP.
License: free for non-commercial purposes.
Maintainer: Didier Leibovici <didier@fmrib.ox.ac.uk>.
URL: http://www.fmrib.ox.ac.uk/~didier
#############################################
TO INSTALL see instructions in R documentation
#############################################
 
#################
Package: PTAk
Version: 1.1-2
Date: 2001/02/22
If one does not want to use the tensor package the default arguments of CONTRACTION
and CONTRACTION.list has to be change with usetensor=FALSE.

Some C++ code are currently developed  to speed the core algorithms.
 #
Package: PTAk
Version: 1.1-2
Date: 2001/04/17
 smoothing option allows different smoothing for different Principal Tensors.
 #
Package: PTAk
Version: 1.1-4
Date: 2001/06/06
  just updating few Rd mistakes for R 1.3.0
Package: PTAk
Version: 1.1-5
Date: 2002/05/08
  just updating  for R 1.5.0
Package: PTAk
Version: 1.1-6
Date: 2002/05/08
  just updating  for R 1.5.0
Package: PTAk
Version: 1.1-5
Date: 2003/06/06
  just updating  for R 1.7.0
