Product integrals are to products, as integrals are to sums. They have been around for more than a hundred years, they have not become part of the standard mathematician’s toolbox, possibly because no-one invented the right mathematical symbol for them. The authors have remedied that situation by proposing the symbol and providing this font.
The authors are Richard Gill and J C Loredo-Osti.
License: ofl Version dated: 2001-08-09 Catalogued: 2014-02-26