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exercise numbering and referencing
Signed-off-by: szdytom <szdytom@qq.com>
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@ -111,7 +111,7 @@
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#tab 因此,这样的 $lambda$ 不存在。
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]
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#exercise_sol(type: "proof")[
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#exercise_sol(type: "proof", ref: <1A-ffn-add-assoc>)[
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证明:$(x+y)+z=x+(y+z)$ 对所有 $x,y,z in FF^n$ 成立。
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#note[沿用原书记号1.6与记号1.10,即 $FF$ 表示 $RR$ 或 $CC$,$n$ 表示某一固定的正整数。下文不再赘述。]
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@ -135,7 +135,7 @@
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&= a(b x) $
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]
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#exercise_sol(type: "proof")[
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#exercise_sol(type: "proof", ref: <1A-ffn-mul-unit>)[
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证明:$1 x=x$ 对所有 $x in FF^n$ 成立。
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][
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根据定义,令 $x = (x_1, x_2, dots, x_n)$,则有:
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@ -145,7 +145,7 @@
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&= x $
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]
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#exercise_sol(type: "proof")[
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#exercise_sol(type: "proof", ref: <1A-ffn-distri-2v1s>)[
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证明:$lambda (x+y) = lambda x + lambda y$ 对所有 $lambda in FF$ 和 $x,y in FF^n$ 成立。
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][
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根据定义,令 $x = (x_1, x_2, dots, x_n)$,$y = (y_1, y_2, dots, y_n)$,则有:
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@ -155,7 +155,7 @@
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&= lambda x + lambda y $
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]
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#exercise_sol(type: "proof")[
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#exercise_sol(type: "proof", ref: <1A-ffn-distri-1v2s>)[
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证明:$(a+b)x = a x + b x$ 对所有 $a,b in FF$ 和 $x in FF^n$ 成立。
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][
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根据定义,令 $x = (x_1, x_2, dots, x_n)$,则有:
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@ -167,17 +167,17 @@
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#simple_box(title: [$FF^n$ 是向量空间])[
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#show: unset-list-indent
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#tab 在原书的下一个小节(1B 向量空间的定义)中,正式给出了向量空间的定义。其实上面的习题就是在引导我们去验证:$FF^n$ 是一个向量空间。具体而言,原书定义1.13和定义1.18分别给出的 $FF^n$ 上的加法和标量乘法的定义,而其所需满足的性质:
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#tab 在原书的下一个小节(1B 向量空间的定义)中,正式给出了向量空间的定义。其实上面的习题就是在引导我们去验证:$FF^n$ 是一个向量空间。具体而言,原书定义1.13和定义1.18分别给出的 $FF^n$ 上的加法和标量乘法的定义,而我们已经证明了其所需满足的性质:
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/ 可交换性: \
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原书定理1.14
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/ 可结合性: \
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习题11
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@1A-ffn-add-assoc
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/ 加法单位元: \
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原书记号1.15定义了 $0$,其性质容易验证
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/ 加法逆元: \
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原书定义1.17
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/ 乘法单位元: \
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习题13
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@1A-ffn-mul-unit
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/ 分配性质: \
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习题14和习题15
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@1A-ffn-distri-2v1s 和@1A-ffn-distri-1v2s
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]
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@ -229,9 +229,13 @@
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}
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}
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#let exercise_sol(e, s, type: "proof", label: none) = {
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#let exercise_sol(e, s, type: "proof", label: none, ref: none) = {
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counter(math.equation).update(0)
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figure(e, kind: "exercise-problem", supplement: "习题")
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if ref == none {
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figure(e, kind: "exercise-problem", supplement: "习题")
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} else [
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#figure(e, kind: "exercise-problem", supplement: "习题") #ref
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]
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let splt = (
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"proof": "证明",
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"answer": "解答",
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