# Template:Brookman&Davis&Khan2007

## 1 Corrections: Unoriented vs Oriented

There are two typos regarding unoriented vs oriented homeomorphism classes.

• On Line 18 of Page 949, replace $I_n$$I_n$ with $\bar{I}_n$$\bar{I}_n$.
• On Line 18 of Page 949, replace $J_n$$J_n$ with $\bar{J}_n$$\bar{J}_n$.

Thanks to Stanley Chang for catching them.

## 2 Corrections: Orientation Character

There are four minor typos regarding orientation character. The errors are contained entirely in the second paragraph of Remark 10 and do not affect the rest of the paper.

• On Line -5 of Page 955, the first term of the exact sequence should have trivial orientation character, $L_{n+1}(\Zz[\Zz_2*\Zz_2])$$L_{n+1}(\Zz[\Zz_2*\Zz_2])$.
• On Line -4 of Page 955, the second term of the exact sequence should have non-trivial orientation character, $L_{n+2}(\Zz[\Zz] \to \Zz[\Zz_2^- * \Zz_2^-])$$L_{n+2}(\Zz[\Zz] \to \Zz[\Zz_2^- * \Zz_2^-])$.

Consequently, the unwritten connecting homomorphism becomes $\partial: LN_n(\Zz \to \Zz_2^-*\Zz_2^-) \to L_n(\Zz[\Zz_2*\Zz_2])$$\partial: LN_n(\Zz \to \Zz_2^-*\Zz_2^-) \to L_n(\Zz[\Zz_2*\Zz_2])$, which is used in the first paragraph of the remark.

• On Line 2 of Page 956, replace $\Zz[\Zz_2^-*\Zz_2^-]$$\Zz[\Zz_2^-*\Zz_2^-]$ with $\Zz[\Zz_2*\Zz_2]$$\Zz[\Zz_2*\Zz_2]$.
• On Line 2 of Page 956, replace $\Zz[\Zz] \to \Zz[\Zz_2*\Zz_2]$$\Zz[\Zz] \to \Zz[\Zz_2*\Zz_2]$ with $\Zz[\Zz] \to \Zz[\Zz_2^-*\Zz_2^-]$$\Zz[\Zz] \to \Zz[\Zz_2^-*\Zz_2^-]$.

This notation agrees with the conventions of Wall [Wall1999] and Ranicki [Ranicki1981].