<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Ok. Thanks. Now how do I write this function?</div><div><br></div><div>∣∣-pres-≡ : {x y : ℤ} → x ≡ y → ∣ x ∣ ≡ ∣ y ∣</div><div><br></div><div>Ruben</div><br><div><div>On 28/01/2010, at 11:23 PM, Ulf Norell wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><br><div class="gmail_quote">On Thu, Jan 28, 2010 at 12:36 PM, Ruben Henner Zilibowitz <span dir="ltr"><<a href="mailto:rzilibowitz@yahoo.com.au">rzilibowitz@yahoo.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 ..8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div style="word-wrap:break-word"><div>Hi,</div><div><br></div><div>If I do that I get a parse error:</div><div><br></div><div><div>WierdError.agda:12,15:</div><div>Parse error )<ERROR> ≡⟨ refl ⟩ ( + m ) ≡⟨ x≡y ⟩ ....</div>
</div></div></blockquote><div><br></div><div>Ah, the problem is that you've used the wrong kind of bar. The ascii bar is reserved for the with construct, the abs function uses U+2223 which you get by typing \| or \mid in the Agda input method.</div>
<div><br></div><div>/ Ulf</div></div>
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