The phrase "a certain simple" is not correct in standard written English.
It may be intended to describe something that is simple in a specific or particular way, but the construction is awkward and unclear.
Example: "In a certain simple manner, he explained the concept to the students."
Alternatives: "a particular simple" or "a specific simple".
For a certain simple class of chemical reaction networks, viz.
He is toe-tappingly upbeat and exudes a certain simple buoyancy; he just loves writing words and music and does it every day.
They are barely decorated at all, but they manage to have a certain simple ease about them that belies their starkness.
In this paper, through a certain simple modification, we break the above restricting condition on the vehicle's pitch angle in diving motion so that the vehicle could take free pitch motion.
There still seemed to be a gap, however, between the living and the nonliving, though E.H. Haeckel, a 19th-century German zoologist, thought that certain simple organisms could have been generated from inorganic matter and, indeed, that a certain simple sea creature may well be in process of generation in this way even now.
Illustrations of the design property are given for a certain simple model of single design variable and design settings, and the comparison of results between the MBE approach and Box and Draper's (J. Amer. Statist. Assoc. 54 (1959) 622) approach are reported by using the average mean squared error (AMSE) value as the performance criterion.
There is a crying in the wilderness quality to her book, a sense that certain simple truths have been lost sight of in the smoky quarrelsomeness of American life.
Such a limit could rule out certain simple theoretical models of what drove inflation, Spergel says: "That's not as much fun as discovering gravitational waves, but it's progress".
As a chemist, Paul Dietze was an expert on the chemical transformations of certain simple organic molecules.
But for certain simple, especially local, issues – should a new road be built?, should a tower block be demolished?
Traditional logic studied certain simple relationships between classes, namely being a subclass of and having a nonempty intersection with.
