(n.) a variable, especially in a DO-loop, that appears only on the right side of an equals sign. The variable is read only, it is never assigned a new value.
An invariant is a type of assertion that describes a relationship between variables that holds as the values of those variables change. A special type of invariant is the loop invariant.
An Assertion about some design element that must be true at all times, except during specifically transient situations such as the middle of the execution of a method, or the middle of an uncommitted database transaction.
a claim about the state of a program that is true every time the program's execution reaches a particular point
a condition or relation that is always true
a condition that always true a a certain point (or points) in the program
a condition that is always true at a particular point in an algorithm
a condition that is always true at a particular point in a program
an expression which must evaluate to true whenever the entity being described is in a stable state
a property that holds at a certain point or points in a program - these are often seen in assert statements, documentation, and formal specifications
An assertion that should always be true for a specified segment or at a specified point of a computer program. From [IEEE90].
a statement about some condition or relationship that must always be true.
Unlike the TCR subchains, which express regions of variable amino acid sequences at their binding sites, all (non-mutated) CD3 subchains of a given type express the exact same amino acid sequence (Janeway et al., 2005).