Some questions of method in phyllotaxis

Some Questions

These are some questions I am every interested in. Your solution to any question in this draft would be welcome. I keep updating this draft. 1. Classical recursion theory We use R to denote the partial ordering of r.e. degrees and Dn to denote the partial ordering of n-r.e. degrees. Yang and I proved thatR is not a Σ1-substructure of Dn. Question 1.1 (Khoussainov). For n > 1, is there a functio...

E-Learning: some unanswered questions

Some Questions in Algebraic Geometry

Frans Oort \Een zot kan meer vragen \One fool can ask more questions dan tien wijzen kunnen beantwoorden." than ten wise men can answer." Een oud Nederlands spreekwoord. An old Dutch saying. Introduction In June 1995 several mathematicians will gather in Utrecht for a conference on \Arithmetic and geometry of abelian varieties," and this seems a good occasion to share with them some of the ques...

hazard evaluation of incinerators in mobin petrochemical company using hazop method

چکیده ندارد.

A Method for Generating Phyllotaxis over Surfaces of Revolution

This paper describes a method for generating phyllotaxis on surfaces of revolution. It extends the work done by previous authors in using Lindenmayer systems (L-systems) to model phyllotaxis in plants for the purposes of generating realistic visual models. The method described permits placement of small elements in phyllotactic patterns over surfaces of revolution. An area-based phyllotactic mo...