The phrase "a collection of one" is correct and usable in written English.
It can be used to describe a situation where something is grouped or categorized, but the group consists of only a single item.
Example: "In this study, we examined a collection of one, focusing solely on the unique characteristics of the individual specimen."
Alternatives: "a single item" or "one entity".
I was working on a collection of one hundred tins.
The pop sensations, who have sold over 17 million records globally, will launch the scent as the first in a collection of One Direction fragrances.
There had long been talk about revitalizing downtown -- a collection of one- and two-story mom-and-pop businesses -- said Barbara Mitrani, a trustee of the Leonia Taxpayers Association.
You can buy a collection of one of each of these well-developed plants in 9cm pots for just £12.95 inc UK p&p, or you can buy a triple collection for only £32.85, saving £6.
A collection of one- and two-dimensional numerical examples is presented to demonstrate high resolution and robustness of the methods in capturing smooth and non-smooth solutions.
A virtual network is a collection of one or more virtual machines connected to exchange information or provide a service to other virtual machines or computers.
We had no budget to speak of, so they became the only thing we had to build the little intimate space we needed for a collection of one-on-one encounters.
A new series, Cucumber, will be on Channel 4 on Thursdays at 9PM, followed by Banana – a collection of one-off stories from all sexualities and persuasions – at 10PM on E4.
A new approach, two level simulation (TLS), is developed based on the explicit reconstruction of the small-scale velocity by solving the small-scale governing equations on the domain with reduced dimension representing a collection of one-dimensional lines embedded in the three-dimensional flow domain.
The soundtrack to Alan Partridge: Alpha Papa, which receives its world premiere in Norwich on Wednesday, will deliver an unexpected sales boost to a collection of one-hit wonders, 70s novelty hits and soft rock obscurities hand-picked by the spoof DJ, created by Steve Coogan.
