The phrase "a proof of existence" is correct and usable in written English.
It can be used in contexts where you are referring to evidence or documentation that confirms the existence of something or someone.
Example: "The scientist provided a proof of existence for the previously theorized particle, which was a significant breakthrough in the field of physics."
Alternatives: "evidence of existence" or "verification of existence".
By means of a reanalysis of published data (Schreuder & Baayen, 1997), using random regression models, we present a proof of existence of systematic variability between participants that is ignored in the standard psycholinguistic analytical procedures.
This paper is the result of the author's attempt to answer these questions and gives a proof of existence of natural frequencies for systems with artificial restraints (springs) having positive or negative stiffness coefficients, and their convergence towards constrained systems.
Biology gives us a proof of existence of a solution, given that the neocortex demonstrates similar abilities.
Dufwenberg and Kirchsteiger (2004) showed that extending the concept of reciprocity for dynamic games does not allow for a proof of existence using backward induction, given that the best action of each player at each history not only depends on the strategy of the other players, but also on the actions of the same player at other histories.
Walras used this statement to move toward a proof of existence of solutions to general equilibrium but it is commonly used today to illustrate market clearing in money markets at the undergraduate level.
We used BLASTN, the standard Nucleotide BLAST (https://blast.ncbi.nlm.nih.gov/?Blast.cgiCMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=References), to find at least two independent expressed sequence tag (EST) sequences, or one manually curated RNA sequence, that encompass the intron, as a proof of existence of intron sequences.
By mining gateway genes related to hippocampal aging from networks made from gene expression in young and middle-aged mice, we provide a proof-of-concept of existence and importance of gateway nodes.
Perhaps somewhat surprisingly, Plantinga himself agrees: the "victorious" modal ontological argument is not a proof of the existence of a being which possesses maximal greatness.
So, as a proof of the existence of a being which posseses maximal greatness, Plantinga's argument seems to be a non-starter.
"As the church wasn't afraid of secularization anymore, sainthood stopped being a proof of the existence of the supernatural and became a way to promote exemplary lives," Menozzi said.
He coined the phrase "it from bit" to provide a proof of the existence of everything in the universe.
