The Prime Power Conjecture (PPC) states that abelian planar diierence sets of order n exist only for n a prime power. Evans and Mann 2] veriied this for cyclic diierence sets for n 1600. In this paper we verify the PPC for n 2;000;000, using many necessary conditions on the group of multipliers.

Objective ML is a small practical extension to ML with objects and top level classes. It is fully compatible with ML; its type system is based on ML polymorphism, record types with polymorphic access, and a better treatment of type abbreviations. Objective ML allows for most features of object-oriented languages including multiple inheritance, methods returning self and binary methods as well a...

This prospective study included 152 elderly patients (mean age, 80 years; range, 72-88 years) with a hip fracture treated surgically. Comorbidities were evaluated, and B-type natriuretic peptide was measured at baseline and at postoperative days 4 and 5 in addition to troponin I. Major cardiac events were recorded, and 1-year mortality was assessed. Comorbidity models with the important multiva...

Venous thromboembolism from a “thrombotic storm”–like syndrome is major cause of morbidity and mortality in patients with active or “recovered” COVID-19. Patients should be risk-stratified, optimally by pulmonary embolism (PE) response team (PERT), considered for escalation care if found intermediate high-risk PE. We present series COVID-19-associated PE thrombotic storm D-dimer >10 000 ng/m...

BACKGROUND The use of ultrasound (US) in regional anaesthesia enables a reduction in the local anaesthetic volume. The present study aimed to determine the minimum effective volume (MEV(90)) of 0.5% bupivacaine with epinephrine for interscalene brachial plexus block (ISBPB). METHODS The volume of the anaesthetic was determined using a step-up/step-down method and was based on the outcome of t...