The phrase "a mere extension of" is correct and usable in written English.
It can be used to describe something that is simply an addition or continuation of something else, often implying that it lacks significance or originality.
Example: "The new policy is just a mere extension of the previous regulations, offering no new insights or improvements."
Alternatives: "just an addition to" or "simply a continuation of".
Some indeed see the IPO market as a mere extension of the venture-capital boom, and not its cause.
In some respects this was a mere extension of the idea that in total war the strategic goal was to break the will of a society to resist.
It seems we can expect a mere extension of the prevailing agricultural paradigm of chemical dependence, rather than the reduced reliance on pesticides that proponents of transgenic plants claim.
Mr. Woodward writes that John Podesta, the director of Mr. Obama's transition team, "had the strong impression that Obama wanted a national security adviser who wasn't perceived as his guy, a mere extension of the president".
Turkey, at first a mere extension of the Seljuk sultanate of Iran in the mid-11th century, became the autonomous "Sultanate of Rum" after the Mongol invasion of Iran of 1219 to 1221.
The drug that enables viewers to deceive themselves into jollity is a mere extension of the digital technology that renders actors disposable and places their likenesses in disposable entertainments (such as an action thriller that revises the ending of "Dr. Strangelove" into a moment of yahoo triumph).
But two of those losses were to the Reds, and Cain's 75-pitch, five-inning stint Saturday night felt like a mere extension.
Mere extension of range is not vision - of that we are quite certain.
But it is not clear why Prism providers would incur significant extra costs for the mere extension of the expiration date for the older set of procedures already in use — especially when the problem leading to the delays in approving new certifications involved an issue only on the upstream surveillance operation.
And this value goes far beyond mere extension of life balanced against the cost of treatment, it encompasses what a patient can do with that time -- attend weddings, births and family lifecycle events that make life worth living in the first place!
Second, in axonal growth cones, Arp2/3 complex functions seem to interfere to some extend with the mere extension of the growth cone.
