Regarding the paper "An elliptic K3 surface associated to Heron triangles" <br>
Ronald van Luijk<br><br>

Part (2) of the main theorem (Thm. 1.1) takes two rational numbers <br>
    sigma_0, sigma_1 > 1. <br>
Unfortunately, the proof uses that if these are different, then the ratios <br> 
       tau_i = (sigma_i-1) / ( sigma_i*(sigma_i+1) )<br>
are different. This is clearly a false statement, as the counterexample <br> 
       sigma_0 = 2    and sigma_1 = 3 <br>
shows. Indeed, for n=1, the triangles found in Remark 1.2 for these <br> 
sigma_i are similar.<br><br>

One way to fix the theorem is to take sigma_i > 1 + sqrt(2).<br> 

I thank Martin Br&aring;telund for noting this and suggesting the fix.<br>