Hal Koch: N. F. S. Grundtvig. 2. udgave

4 4 1 2 2 1 1 2 Cat Cat Cat Cat N N F G F G N ! N N N N N 1 Introduction

We here consider Elementary Net Systems (ENI-systems) with inhibitor arcs executed according to the semantics, and transition systems generated by them (TSENI). The relationship between nets and their transition systems is established via the notion of a region. We introduce morphisms both for the ENI-systems, and for the TSENI transition systems. We then de ne the category of ENI-systems ( ), ...

Great ! How ’ s the simulation ? H a n d o f f How ’ s life ? Hectic !

Upper Bounds for the length of s - Extremal Codes over F 2 , F 4 , and F 2 + u F 2

Our purpose is to find an upper bound for the length of s-extremal codes over F2 (resp. F4) when d ≡ 2 (mod 4) (resp. d odd). This question is left open in [6], [2]. More precisely, we show that there is no s-extremal binary code of length n ≥ 21d− 82 if d > 6 and d ≡ 2 (mod 4). Similarly we show that there is no s-extremal additive F4 code of length n ≥ 13d− 26 if d > 1 and d is odd. We also d...

Koch ’ s Postulates — Then and Now

T his story begins in the early 1880s. The germ theory of disease was fairly well established, although some experts continued to challenge it. For example, Theodor Billroth (1829– 1894) of Vienna, often called the founding father of abdominal surgery, did not immediately accept the germ theory, but later embraced the concept and became very successful in many pioneering surgeries. Another crit...

Investment Company Institute ® Investment Company Institute ® Perspective M U T U a L F U N D a S S E T S a N D F L O W S I N 2 0 0 0

In the first few months of the year, the NASDAQ composite equity index surged, and other equity indexes made gains as well. However, as the year progressed a number of factors began to weigh on the equity markets. Short-term interest rates rose in the first half of the year as the Federal Reserve continued a gradual tightening of monetary policy that began in 1999. In addition, the exchange val...