The א ( Aleph ) project
نویسنده
چکیده
A brief introduction to the א project, a TEX extension providing most of Ω and ε-TEX features.
منابع مشابه
Erdos-Rado without choice
A version of the Erdös-Rado theorem on partitions of the unordered ntuples from uncountable sets is proved, without using the axiom of choice. The case with exponent 1 is just the Sierpinski-Hartogs’ result that א(α) ≤ 2 2α . The liberal use made by Erdös and Rado in [2] of the cardinal arithmetic versions of the axiom of choice enables them to give their result a particularly simple expression...
متن کاملNo Bound for the First Fixed Point
Our aim is to show that it is impossible to find a bound for the power of the first fixed point of the aleph function. 0 Introduction אα is called a fixed point of the א-function if אα = α. It is called the first fixed point if α is the least ordinal such that אα = α. More constructive, the first repeat point of the א-function is the limit of the following sequence א0,אא0 ,אאא0 ,אאאא0 , . . . T...
متن کاملImmune System Modulation in the Central Nervous System; a Possible Role for Endocannabinoids
The immune system is designed to protect the body from infection and tumor formation. To perform this function, cells of the immune system can be dangerous for the survival and function of the neuronal network in the brain under the influence of infection or immune imbalance. An attack of immune cells inside the brain includes the potential for severe neuronal damage or cell death and therefore...
متن کاملComparison of Information Retrieval Capabilities in Library Software of Payam, Voyager and Aleph
The purpose of this study was comparing Information Retrieval Capabilities in Web-based Library Software of Payam, with Voyager and ALEPH. A checklist designed and included six main trait for evaluation and comparing 73 scales. Data collected by experts' observing of the software's OPAC. Data analyzed by the descriptive statistics methods. Findings shows the preferences in search capabilities i...
متن کاملMapping theorems on א-spaces
In this paper we improve some mapping theorems on א-spaces. For instance we show that an א-space is preserved by a closed and countably bi-quotient map. This is an improvement of Yun Ziqiu’s theorem: an א-space is preserved by a closed and open map.
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