The phrase "an extensive proof of" is correct and usable in written English.
It can be used when discussing a detailed or thorough demonstration or verification of a concept, theory, or claim.
Example: "The research paper provides an extensive proof of the theorem, leaving no room for doubt about its validity."
Alternatives: "a comprehensive demonstration of" or "a thorough verification of".
We have previously provided extensive proof-of-concept evidence for the powerful approach of using genetically identical monozygotic (MZ) twins discordant for type 2 diabetes to identify non-genetic metabolic and molecular defects in type 2 diabetes [ 4, 14].
The challenge explains harms so obvious and unconstitutional that the judge does not need extensive proof of the section's impact to block it.
Maybe the incidents described by students are completely accurate or maybe they aren't, but all of this hand wringing about needing extensive proof of racism rings hollow coming from the conservative media, given their penchant for making a mountain out of a molehill.
Nevertheless, great challenges in terms of device fabrication and integration still remain, and an extensive set of proof-of-concept experiments still needs to be provided.
We provide extensive experimental proof of this concept by conducting a series of tests with a range of controlled values of sample size and machine stiffness.
(Below, an iPad proof-of-concept app).
Dr. Mikuriya said he had conducted an extensive review of medical history for each patient and had required documentary proof of illness.
The META LIC (MEgawatt TArget:Lead bIsmuth Cooled) target concept was developed following an extensive analysis of existing and new proposed designs and reached the level of proof of principle within only 2 years.
In a single experiment, these results recapitulate extensive epidemiological and immunogenetic research and represent a proof-of-concept that biologically meaningful association signals are identifiable using a hypothesis-free strategy.
