diferenciálnej
Diferenciálnej is the feminine singular genitive form of the Slovak adjective diferenciálny, meaning differential or relating to differentiation. In Slovak, adjectives decline to agree with the gender, number, and case of the nouns they modify. Therefore, diferenciálnej is used before feminine nouns in the genitive singular. Common examples include diferenciálnej rovnice, meaning “of a differential equation,” and diferenciálnej geometrie, meaning “of differential geometry.” The root diferenciálny covers concepts linked to differentiation in calculus, such as differential operators and differential equations, and it appears across mathematical, scientific, and technical writing.
As a grammatical form, diferenciálnej by itself is not a technical term; it is an inflected form