Equation Icon  ∫ ⌊∫∞ ( ∫ ) ⌋ 2 ⌈ ( 2 n−1 ) ⌉ ∥u∥ η,0,Ω := |&tidle;u(η + iξ,x1,k )| d k dx1 dξ, (5.53 ) ℝ 0 ℝn−1 ∫ ( ∫ ) 2 ( 2 n−1 ) ∥u∥η,0,𝒯 := |&tidle;u(η + iξ,0,k)| d k dξ. (5.54 ) ℝ ℝn−1