Ivar Fredholm

Memorial: Sven-Ivar Seldinger

THE Jon~ivar. OF BIOLOGICAL CHEYISTRY

In pursuing quantitative histochemical investigations aimed at demonstrating the biochemical architecture of human frontal cortex (l-4), we found it necessary to determine ganglioside sialic acid in submicrogram amounts. Even when adapted to the microscale, spectrophotometric methods lack the sensitivity required for studying nervous tissue samples containing less than 0.3 pg of sialic acid. Si...

A tribute to Sven-Ivar Seldinger.

It is almost impossible to imagine life without things we grew up with, so it is a little hard for us to feel the thrill of angiographers when they first heard about the Seldinger technique [1]. Present-day radiologists cannot even guess how angiography could have been done without it. We are so used to this method that we have begun dropping the eponym, as it has become the “natural” way to in...

IVAR: A Conceptual Framework for Dependency Management

The design of software systems tend to degrade throughout time. Changes in code end up introducing new and unplanned dependencies among modules, causing the elegance of the design to be slowly lost in the form of structural patches and violations of previously established architectural rules. In this study, we propose a conceptual framework for dependency management. Our aim is to conceive a fr...

A General Fredholm Theory III: Fredholm Functors and Polyfolds

2 Ep-Groupoids and Generalized Maps 17 2.1 Ep-Groupoids . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2 Functors and Equivalences . . . . . . . . . . . . . . . . . . . . 21 2.3 Inversion of Equivalences and Generalized Maps . . . . . . . . 28 2.4 Strong Bundles over Ep-Groupoids . . . . . . . . . . . . . . . 33 2.5 Auxiliary Norms . . . . . . . . . . . . . . . . . . . . . . . . . 4...