Errors in exercises

We recommend you make the following corrections to the exercises in your copy of the book.

Corrections to the fourth reprinted edition (November 2017).

These errors occur in the first printings and the first four corrected reprints (the last dated November 2017). As of March 2021, this list is in the process of being updated. If you submitted an error report it should be reflected here shortly.

• Page 89, exercise 9.3: There is a sign inconsistency with the convention adopted in the other parts of the book. This is solved by replacing \theta by -\theta in eqns 9.56, 9.57 and 9.58. Note that v^{i} = \omega^{0i} = -\omega^{i0}.
• Page 89, exercise 9.4: For consistency with the rest of the book, the definitions of p_{\mu} and M^{\mu\nu} should both have minus signs removed (i.e. replace -i with i in both definitions). With the change in 9.58 from the previous correction, eqn 9.63 should read K^{i} = M^{0i} to make things consistent.

These error occurs in the first printings and first two corrected reprints. It is corrected in the third reprint, identified by the note dates May 2016 in the Preface.

• page 312, exercise 34.1(c): the equation for G should read σa²/L.

These errors occur in both the first printings and the first corrected reprints. They are corrected in the second corrected reprint, identified by the note, dated Mach 2015, in the Preface.

• page 27, exercise 2.3: in eqn 2.68, the term in brackets (\hbar/m) should come with a superscript 1/2 (i.e. we take the square root of this quantity).
• page 88, exercise 9.2: in eqn 9.52, U should be D.
• page 89, exercise 9.4: in eqn 9.60, the final term in the round brackets should read x^ν∂^μ(rather than x^ν∂^ν as printed). In the line under eqn 9.61 swap -i for i in the expressions for p_μ and M^μν.
• page 187, exercise 19.4: both instances of δ⁽⁴⁾(x=0) in the exercise should be replaced with either ∫d⁴x or (2π)⁴δ⁽⁴⁾(p=0).
• page 246, exercise 26.3: The two instances of ψ(0) in eqn 26.31 should both be φ(0).
• page 254, exercise 27.7: the theta function should be inside the integral of eqn 27.45.
• page 335, exercise 36.4: three lines below eqn 36.66, U should be U^†.
• page 353, exercise 39.1: An overall minus sign should be included on the left-hand side for consistence with what follows.
• page 359, exercise 40.1: missing factor of -1 on the right-hand side.
• page 368, exercise 41.4: ‘(2+1)-dimensional spacetime’ should read ‘(1+1)-dimensional spacetime’ (i.e. the model is defined in two spacetime dimensions in total.)
• page 399, exercise 43.5: δ⁽⁴⁾(x=0) should be replaced with either ∫d⁴x or (2π)⁴δ⁽⁴⁾(p=0).
• page 432, exercise 46.3(b): a factor of -1 is missing from the right hand side of both lines of the expression.

Last updated 29/03/21.