S. M. Ghasemi Nejad - Department of Mathematics, Faculty of Shariaty, Tehran Branch, Technical and Vocational University (TVU), Tehran, Iran
R. A. Borzooei - Department of Mathematics, Shahid Beheshti University, Tehran, Iran
M. Bakhshi - Department of Mathematics, University of Bojnord, Bojnord, Iran

In this paper, the notions of Bosbach states and state-morphisms on implication basic algebra are introduced, along with their properties and related results. It is proved that Bosbach states coincide with Riecan states on bounded implication basic algebras. Accordingly, the relations between Bosbach states and state-morphisms are discussed. It is proved that  sm  is a state-morphism on IB if and only if  sm  is a Bosbach state and  sm(x V y)=sm(x)V sm(y) . In addition, the concept of internal states on implication basic algebras is defined, and accordingly, the notions of IS-prefilters, IS-filters, and IS-congruence relations on implication basic algebras are introduced. Then, it is proved that one-to-one correspondence is available between the set of all IS-filters and IS-congruence relations on implication basic algebras.Finally, the new notion of generalized state maps from an implication basic algebra  IB۱  to an arbitrary implication basic algebra  IB۲  is defined and generalized state-morphisms and generalized internal states as two types of individual generalized state maps are introduced. This confirmed that the generalized internal states are a generalization of internal states, and the generalized state-morphisms are a generalization of state-morphisms on implication basic algebras. Finally, it is shown that a generalized internal state  gs  is an internal state on implication basic algebra IB if  gs۲=g.

Basic algebra, implication basic algebra, Bosbach state, Rievcan state, state-morphism, internal state, generalized state