منابع مشابه
The History of Base-Ten-Blocks: Why and Who Made Base-Ten-Blocks?
The purpose of this study is to present evidence of how base-ten-blocks have been developed and emphasized as a tool for learning in mathematics education. After an introduction of the theme, we discuss the theoretical and epistemological perspectives that provide the basis for our analysis of the literature. Then, we illustrate how base-ten-blocks have historically been associated with the num...
متن کاملEmptiness of Homogeneous Linear Systems with Ten General Base Points
In this paper we give a new proof of the fact that for all pairs of positive integers (d, m) with d/m < 117/37, the linear system of plane curves of degree d with ten general base points of multiplicity m is empty.
متن کاملGreedy and lazy representations in negative base systems
We consider positional numeration systems with negative real base −β, where β > 1, and study the extremal representations in these systems, called here the greedy and lazy representations. We give algorithms for determination of minimal and maximal (−β)-representation with respect to the alternate order. We also show that both extremal representations can be obtained as representations in the p...
متن کاملArithmetics in numeration systems with negative quadratic base
We consider positional numeration system with negative base −β, as introduced by Ito and Sadahiro. In particular, we focus on arithmetical properties of such systems when β is a quadratic Pisot number. We study a class of roots β > 1 of polynomials x − mx − n, m ≥ n ≥ 1, and show that in this case the set Fin(−β) of finite (−β)-expansions is closed under addition, although it is not closed unde...
متن کاملBase Analogue Induced Arabinose-negative Mutants of Escherichia Coli.
EOXYRIBONUCLEIC acid codes information as a specific linear sequence of the base pairs adenine-thymine (AT) and guanine-cytosine (GC) ( WATSON and CRICK 1953). Replacement of an AT pair by a GC pair, o r a GC pair by an AT pais may cause a visible mutation. A transition is a base-pair change as written above in which a purine replaces a purine, and a pyrimidine replaces a pyrimidine (FREESE 196...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Missouri Journal of Mathematical Sciences
سال: 1994
ISSN: 0899-6180
DOI: 10.35834/1994/0602091