Kernel formation (Ex)

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Exercise 0.1. What is the kernel formation of the degree 1 normal map of the $3$$; {{beginthm|Exercise}} \label{ex:kf}What is the kernel formation of the degree 1 normal map of the dimensional Lens space (f,b): L(m,n)^3 \longrightarrow S^3? {{endthm}} {{beginthm|Exercise}} Find trivial formations for S^3 (Hint: Use the result in the Exercise \ref{ex:kf}) {{endthm}} {{beginthm|Exercise}} Similarly, write down a boundary formation for \mathbb{R}P^3. {{endthm}} [[Category:Exercises]] [[Category:Exercises with solution]]3$ dimensional Lens space
$\displaystyle (f,b): L(m,n)^3 \longrightarrow S^3?$

Exercise 0.2. Find trivial formations for $S^3$$S^3$ (Hint: Use the result in the Exercise 0.1)

Exercise 0.3. Similarly, write down a boundary formation for $\mathbb{R}P^3$$\mathbb{R}P^3$.