Utilizing the theories of BK spaces and multiplier spaces, this paper discuss the necessary and sufficient condition which fundamental and total biorthogonal system in Banach spaces which don t contain copy of is unconditional basis.

A Banach space X with a unconditional basis {xn} is said to have the property P if, every bounded block basis sequence of {xn} spans a complemented subspace of X.

This paper reviews a report about the first lot of rectifiers and thyristors, which were manufactured by NTD-Si (that is the stripeless silicon), with high voltage and high current 30-years ago.

Discusses the relations of absolute monotone bases,absolute bases and absolute rearrange bases,and discusses the relations of absolute bases and unconditional bases.

In addition, some properties of unconditional bases for Banach spaces is also given.

Using the properties of opcrator domination,a result on the unconditional basesperturbation of(D)dass of operatols is given.

Through expounding on Jaques Derrida s differentiation of the "sovereignty" and the "unconditionality," the thesis explores Derrida s concept of "wholly other" and emphasizes that the understanding of this essential concept is the foundation of endorsement with a Derridean profession of faith or a pledge of allegiance.

The first problem is about explaining "unconditionally" in Article I of GATT 1994.

In Critique of Pure Reason Immanuel Kant proposed the qu estion of “infinite condition,”which remains in particular in the sphere of ep istemology, and peculiarities the inherent speculative reason.