conditional identity
... conditional条件句；条件式 conditional identity条件恒等式 conditional inequality条件不等式 ...
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利用辛变换条件得到了一些新的切比雪夫多项式公式、三角恒等式和双曲恒等式。
In this paper by using the symplectic transformation condition, some new formulas including Chebyshev Polynomial, trigonometric identity, hyperbolic identity were obtained.
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