Definition Of Smarandache N-structure

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Smarandache

-structure

In any domain of knowledge, a Smarandache means a weak structure

on

-structure, for

, on a set

such that there exists a chain of proper

subsets

whose corresponding structures

satisfy the inverse inclusion chain where

,

signifies strictly stronger (i.e., structure satisfying more axioms).

By proper subset one understands a subset different from the empty set, from the idempotent if any, and from the whole set. Now one defines the weak structure:

Let

be a set,

a proper subset of it, be

an operation on

, and

independent axioms, where

. If the operation

on the set

satisfies the axioms , while on the subset

satisfy the axioms satisfies the axioms

and one writes

is stronger than structure as on

and one writes

But if

satisfies the same axioms on

and

are equal and one writes

When

satisfies the same axioms or less axioms on

structures

the operation

, one says that structure

is weaker than structure or one says that

and does not

, .

one says that structures

.

is weaker than or equal to structure

than on

one says that

and one writes

, or is stronger than or equal to and one writes . For example a semigroup is a structure weaker than a group structure.

This definition can be extended to structures with many operations for a) If

. Thus, let for all

be a set and

a proper subset of it.

, then .

such that

b) If

and

for all , then . In this case, for two operations, a ring is a structure weaker than a field structure. This definition comprises large classes of structures, some more important than others. As a particular case, in abstract algebra, a Smarandache 2-algebraic structure (two levels only of structures in algebra) on a set , is a weak algebraic structure

on

such that there exists a proper subset

of

, which is

. embedded with a stronger algebraic structure For example: a Smarandache semigroup is a semigroup (different from a group) which has a proper subset that is a group. Other examples: a Smarandache groupoid of first order is a groupoid (different from a semigroup) which has a proper subset that is a semigroup, while a Smarandache groupoid of second order is a groupoid (different from a semigroup) which has a proper subset that is a group. And so on. References: 1. Digital Library of Science: http://www.gallup.unm.edu/˜smarandache/eBooksotherformats.htm. 2. W. B. Vasantha Kandasamy, Smarandache Algebraic Structures, book series: (Vol. I: Groupoids; Vol. II: Semigroups; Vol. III: semirings, Semifields, and Semivector Spaces; Vol. IV: loops; Vol. V: Rings; Vol. VI: near-rings; Vol. VII: non-associative Rings; Vol. VIII: Bialgebraic Structures; Vol. IX: Fuzzy Algebra; Vol. X: linear algebra), Am. Res. Press & Bookman, Martinsville, 2002-2003.

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