ab initio

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Ab Initio

[Latin, From the beginning; from the first act; from the inception.] An agreement is said to be "void ab initio" if it has at no time had any legal validity. A party may be said to be a trespasser, an estate said to be good, an agreement or deed said to be void, or a marriage or act said to be unlawful, ab initio. Contrasted in this sense with ex post facto, or with postea.

The illegality of the conduct or the revelation of the real facts makes the entire situation illegal ab initio (from the beginning), not just from the time the wrongful behavior occurs. A person who enters property under the authority of law but who then by misconduct abuses his or her right to be on the property is considered a trespasser ab initio. If a sheriff enters property under the authority of a court order requiring him to seize a valuable painting, but instead he takes an expensive marble sculpture, he would be a trespasser from the beginning. Since the officer abused his authority, a court would presume that he intended from the outset to use that authority as a cloak from under which to enter the property for a wrongful purpose. This theory, used to correct abuses by public officers, has largely fallen into disuse.

ab initio

prep. lawyer Latin for "from the start," as "it was legal ab initio."

ab initio

adverb ab origine, ab ovo, as a start, at first, at the beginning, at the start, chiefly, first, first and foreeost, first of all, firstly, for a beginning, from its birth, from the beginning, in its infancy, in the beginning, in the first place, initially, mainly, originally, primarily, principally
Associated concepts: ab initio, void

ab initio

‘from the beginning’.

AB INITIO, from the beginning.
     2. When a man enters upon lands or into the house of another by authority of law, and afterwards abuses that authority, he becomes a trespasser ab initio. Bac. Ab. Trespass, B.; 8 Coke, 146 2 Bl. Rep. 1218 Clayt. 44. And if an officer neglect to remove goods attached within a reasonable time and continue in possession, his entry becomes a trespass ab initio. 2 Bl. Rep. 1218. See also as to other cases, 2 Stra. 717 1 H. Bl. 13 11 East, 395 2 Camp. 115, 2 Johns. 191; 10 Johns. 253; ibid. 369.
     3. But in case of an authority in fact, to enter, an abuse of such authority will not, in general, subject the party to an action of trespass, Lane, 90 ; Bae. Ab. Trespass, B ; 2 T. It. 166. See generally 1 Chit. Pl. 146. 169. 180.

References in periodicals archive ?
The potential energy should be adequately described by the sum of pair and three-body potentials; the relatively small size of the three-body contribution compared to the pair contribution suggests that nonadditivity of the potential at the four-body level should be tiny (this could be checked by ab initio calculations at selected configurations).
Moldover, Ab Initio calculations for helium: A standard for transport property measurements, Phys.
Ab initio calculation generates four spectra according to tour different conformations which fall into two categories-all-trans (Fig.
We hope that the availability of our measurements in this "adiabatic" regime will spur theoretical developments which will eventually allow ab initio calculations to be carried out even in this highly complex regime.
Because the films contain amorphous material that gives no clear x-ray diffraction signal, we used XANES measurements to help understand the structure of the films and ab initio calculations using FeffMPI to interpret the XANES spectra.
We have reviewed the recent ab initio calculations of [varphi](r) for helium.
The large number of recent ab initio calculations of [varphi](r) demonstrate that this is an active field of research.
One example where computer simulation has advanced metrology quantitatively is the ab initio calculation of thermophysical properties of [He.