We study a twisted version of Grigorchuk’s first group, and stress its similarities and differences to its model. In particular, we show that it admits a finite endomorphic presentation, has infiniterank multiplier, and does not have the congruence property.

We introduce “endomorphic presentations”, or L-presentations: group presentations whose relations are iterated under a set of substitutions on the generating set, and show that a broad class of groups acting on rooted trees admit explicitly constructible finite L-presentations, generalising results by Igor Lysionok and Said Sidki.

The aim of this research was to present a description the somatotipes volleyball players in Pekalongan Regency. This descriptive study using one shoot model approach. Data collection techniques used anthropometric tests and measurements. There were 10 components measured, namely weight measured digital scale, height stadiometer, thickness fat on triceps, subscapular, suprailiac, calves skinfold...

OBJECTIVES To determine whether there is an association between a player's physique and injuries incurred while playing rugby football. METHODS A cohort study was carried out involving all senior rugby clubs in the Scottish Borders during the 1993-1994 rugby season. Somatotype estimates were determined for 1152 (95%) of the 1216 eligible players. Body mass index (BMI), chest to waist ratio, a...

The article presents a program of training sessions that combines different areas fitness. influence classes on the indicators physical readiness women first period adulthood has been established. aim study was to identify features impact fitness 25-35 years somatotypes. involved 86 women. Fitness were held 3 times week. experimental part lasted 24 weeks. Somatotype determined by Heath-Carter m...

The aim of our study was to determine the differences in some anthropometric and physical performance variables of young Croatian female volleyball players (aged 13 to 15) in relation to playing position (i.e., independent variable) and performance level within each position (i.e., independent variable). Players were categorized according to playing position (i.e., role) as middle blockers (n=2...