数学 大学生・専門学校生・社会人 4年弱前

10,68の答えがどうしてこのようになるか教えてください。 分野は重積分のストークスの定理です

By Green's theorem in space (divergence theorem). Prove that that (V x A) - n ds for any closed surface S. S Prove that 10.66. dS ff n ds = 0. where n is the outward drawn normal to any closed surface S. (Hint: Let A = Oc, SS S where c is an arbitrary vector constant.) Express the divergence theorem in this special case. Use the arbitrary property of c. 10.67. If n is the unit outward drawn normal to any closed surface S bounding the region V, prove that fff div n dv = S V Stokes's theorem 40.68. Verify Stokes's theorem for A = 2yi + 3xj - z²k, where S is the upper half surface of the sphere x² + y² + ² = 9 and C is its boundary. Ans. Common value = 9T 10.65. , y = 0,

数学 大学生・専門学校生・社会人 4年以上前

位相幾何学 2種トーラス、ホモロジー群、サイクル このxとyがこのように表されるのはなぜでしょうか？教えてください

Z4 Z2 K Express the cycles x and y using Z1,22,23, and z4. /Z1 サイクルx,yを Z1,22,Z3, Z4を用いて表わせ K K X y= Z1 + Z3 x = Z2 - Z4