A. J. Lohwater's Russian-English Dictionary of the Mathematical Sciences

modifies. The long form of an adjective is used in either an attributive or predicative position.

The long-form adjective is declined into all six cases, and both types of adjective express the three genders in the singular, while there is no gender distinction in the plural. The difference in form between the two types of adjective is in the form of the ending; the short form exhibits a simple ending, while the long form exhibits a compound ending. ² In the above example, the short-form adjective ending is -а (simple), and the long-form ending is -ая (compound).

Adjectives may in some instances stand alone and act as nouns, although they still decline as long-form adjectives: кривая, 'a curve,' is a feminine noun; подынтегральный, 'an integrand,' is a masculine noun.

1. The long form of the adjective. The adjectives сложный, 'complicated,' and дуговой ³, 'arc,' are declined into all the cases in singular and plural, and in the three genders.

сложный вопрос > a complicated question (m.)

сложная задача > a complicated problem (f.)

сложное решение > a complicated solution (n.)

a. сложный; stem: сложн-

	Singular		Plural
	m.		f.		n.
nom.	сложный		сложная		сложное		сложные
gen.	сложного		сложной		сложного		сложных
dat.	сложному		сложной		сложному		сложным
acc.	сложный		сложную		сложное		сложные
instr.	сложным		сложной		сложным		сложными
loc.	сложном		сложной		сложном		сложных

b. дуговой; stem: дугов-