<div dir="ltr"><div><div><div>Maybe you can explain what approaches you have already tried and why you got stuck? I think people would be more inclined to help that way.<br><br></div>To get you started on proof1, here's a hint: since you are proving something about the functions foldr₁ and _⊔_, you can take a look at their definitions and follow the same structure for your proof. For example, since foldr₁ is defined in terms of the helper function foldr, you probably also need to define a helper lemma that proves a similar statement about foldr.<br><br></div>Best regards,<br></div>Jesper<br></div><div class="gmail_extra"><br><div class="gmail_quote">2017-08-14 18:33 GMT+02:00 Serge Leblanc <span dir="ltr"><<a href="mailto:33dbqnxpy7if@gmail.com" target="_blank">33dbqnxpy7if@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Saluton, neniu bonvolas helpi min?<br>
</p>
<p>Hi, nobody wants to help me?<br>
</p><div><div class="h5">
<br>
<div class="m_-5308586550852440085moz-cite-prefix">On 2017-08-06 18:23, Serge Leblanc
wrote:<br>
</div>
<blockquote type="cite">
<span id="m_-5308586550852440085result_box" lang="en"><span>Dear All,</span><br>
<span>I need help to finish these lemmas.</span><br>
<span>They have the same meaning, I am right?</span><br>
<span>All helpers are welcome!</span></span><br>
<br>
Estimata ĉiuj, <br>
Mi bezonas helpon por daŭrigi ci-tiuj pruvojn!<br>
<div class="m_-5308586550852440085moz-signature">Ĉu ili havas je la saman signifon! Ĉu
mi pravas?<br>
Ĉiuj helpantoj estas bonvenaj!<br>
<br>
Sincere.<br>
-- <br>
Serge Leblanc
<hr> gpg --search-keys 0x67B17A3F <br>
Fingerprint = 2B2D AC93 8620 43D3 D2C2 C2D3 B67C F631 67B1 7A3F</div>
</blockquote>
<br>
<div class="m_-5308586550852440085moz-signature">-- <br>
Serge Leblanc
<hr>
gpg --search-keys 0x67B17A3F
<br>
Fingerprint = 2B2D AC93 8620 43D3 D2C2 C2D3 B67C F631 67B1 7A3F</div>
</div></div></div>
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