The Hangulphabet: A Descriptive Alphabet

A Class of Two Generated Automaton Groups on a Three Letter Alphabet

The effects of teaching English alphabet with and without initial introduction of letter names on Iranian grade seven students' reading speed

One of the most important steps in teaching English is teaching its alphabet to the learners. Implementing the best method will highly help teachers to achieve acceptable results in helping students to read better and faster. Two basic methods are frequently used by Iranian educators. Some start by the name of the letters and introduce the sounds that they symbolize later, while others are thos...

Ω-powers and Descriptive Set Theory

We study the sets of the infinite sentences constructible with a dictionary over a finite alphabet, from the viewpoint of descriptive set theory. Among other things, this gives some true co-analytic sets. The case where the dictionary is finite is studied and gives a natural example of a set at the level ω of the Wadge hierarchy.

A Form Analysis of the Muhammad Ibrahim Tehrani's Calligraphic Inscriptions in the Shrine of Imamzade Hamze

The shrine of Imamzade Hamze is part of the Abd Al-Azim complex in the Town of Rey and has a collection of decorations such as the inscriptions. In addition to their religious values, they are considered as important sources for studying the process of changes in the Nastaliq script because of the different methods of drawing the words on the paper. This research, using archival-field sources a...

Ambiguity of omega-Languages of Turing Machines

An ω-language is a set of infinite words over a finite alphabet X. We consider the class of recursive ω-languages, i.e. the class of ω-languages accepted by Turing machines with a Büchi acceptance condition, which is also the class Σ1 of (effective) analytic subsets of X for some finite alphabet X. We investigate here the notion of ambiguity for recursive ω-languages with regard to acceptance b...