"a constant matter" is a correct and usable phrase in written English.
It means something that is always present or happening, and is often used to express ongoing or recurring issues or concerns. Example: Dealing with budget cuts has become a constant matter for our school district.
He also said street crime was a constant no matter what kind of toilet the city provided.
Most of that goes to the bottom line and is a constant no matter what the fluctuations may be in gas prices.
Moreover, the number of nodes and edges is decided by (Q_0) and cardinality bounds in (mathcal{A}_0); it remains a constant no matter how big IMDb grows.
In addition, the absolute value of the solution will not explode in a long run, and the pth moment in the mean always keeps a constant no matter how large the time scale is.
The drive to be the best is a constant no matter the sport.
By that year, of course, the universe was known to be expanding; therefore, the only way to explain a constant (steady state) matter density was to postulate the continuous creation of matter to offset the attenuation caused by the cosmic expansion.
This corresponds well with the observation that the arcR mRNA is not subject to regulation but remains at a constant level no matter if aerobic or anaerobic conditions are present [28].
With such heaters, instead of turning the heating element on and off to produce the desired temperature, the unit instead increases or decreases energy to the heating element to maintain a constant temperature no matter how much water is flowing through the unit.
In reality, this practice is inconsistent with actual case since the obtained buckling load is a constant value no matter how long the column is and whatever the end condition is.
We confirmed that this variation of the parameter's value is necessary: the quality of the results is noticeably degraded if λ is kept at a constant value, no matter how high or low it is.
