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.

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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.
First-principles calculation of the third virial coefficient of helium
Ab initio calculation generates four spectra according to tour different conformations which fall into two categories-all-trans (Fig.
Electronic structure evidence for all-trans poly(methylvinylidene cyanide)
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.
X-ray spectrometry of copper: new results on an old subject
The present study reports ab initio calculation on the formation of HONO from gas phase reaction between the hydroxyl radical and nitric oxide.
Finally the results of our ab initio calculation can be plotted in an energy diagram for reaction (1) including the bonding and non bonding channels as shown in Fig.
Allowed energetic pathways for the three-body recombination reaction of nitrogen monoxide with the hydroxyl radical and their potential atmospheric implications
From the ab initio calculations, atmospheric lifetimes were estimated to range from 0.
PREDICTION OF THE ATMOSPHERIC LIFETIMES OF HALON REPLACEMENTS
F] = 0) elcctric-quadrupolc transition at 282 nm due to external fields are calculated, based on a combination of measured atomic parameters and ab initio calculations.
External-Field Shifts of the [[blank].sup.199][Hg.sup.+] Optical Frequency Standard
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.
Accelerating Scientific Discovery Through Computation and Visualization
We have reviewed the recent ab initio calculations of [varphi](r) for helium.
Ab Initio Values of the Thermophysical Properties of Helium as Standards
One example where computer simulation has advanced metrology quantitatively is the ab initio calculation of thermophysical properties of [He.
Through measurement to knowledge: the inaugural lecture of Heike Kamerlingh Onnes (1882)

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