双变量的 meaning in English

bivariant
bivariate
divariant

Introducing a class of generalized fibonacci sequences with double variables , we establish the relation with aitken , secant , new - raphson , halley transformation etc . , generalize the results of many authors . furthermore , we give a more general generalization of q - matrix
通过引入一类双变量的广义fibonacci序列，建立了其与aitken 、 secant 、 newton - raphson 、 halley等变换的关系，进而给出了q -矩阵的一个更广泛的推广。