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	<title>Equivalence - Revision history</title>
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	<updated>2026-05-04T20:10:24Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://bsccs.stoney-wiki.com/w/index.php?title=Equivalence&amp;diff=29&amp;oldid=prev</id>
		<title>Bfh-sts: Created page with &quot;= Equivalence =  Equivalence is the logical operation corresponding to &quot;IF AND ONLY IF&quot;.   It states that two propositions are logically identical in truth value.  == Symbols == * p ↔ q (standard notation) * p ⇔ q (alternative) * p IFF q (short for &quot;if and only if&quot;)  == Definition == The equivalence &#039;&#039;p ↔ q&#039;&#039; is true if &#039;&#039;p&#039;&#039; and &#039;&#039;q&#039;&#039; have the same truth value.   It is false if their truth values differ.  == Truth Table == {| class=&quot;wikitable&quot; ! p !! q !! p ↔ q...&quot;</title>
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		<updated>2025-10-20T13:28:39Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;= Equivalence =  Equivalence is the logical operation corresponding to &amp;quot;IF AND ONLY IF&amp;quot;.   It states that two propositions are logically identical in truth value.  == Symbols == * p ↔ q (standard notation) * p ⇔ q (alternative) * p IFF q (short for &amp;quot;if and only if&amp;quot;)  == Definition == The equivalence &amp;#039;&amp;#039;p ↔ q&amp;#039;&amp;#039; is true if &amp;#039;&amp;#039;p&amp;#039;&amp;#039; and &amp;#039;&amp;#039;q&amp;#039;&amp;#039; have the same truth value.   It is false if their truth values differ.  == Truth Table == {| class=&amp;quot;wikitable&amp;quot; ! p !! q !! p ↔ q...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;= Equivalence =&lt;br /&gt;
&lt;br /&gt;
Equivalence is the logical operation corresponding to &amp;quot;IF AND ONLY IF&amp;quot;.  &lt;br /&gt;
It states that two propositions are logically identical in truth value.&lt;br /&gt;
&lt;br /&gt;
== Symbols ==&lt;br /&gt;
* p ↔ q (standard notation)&lt;br /&gt;
* p ⇔ q (alternative)&lt;br /&gt;
* p IFF q (short for &amp;quot;if and only if&amp;quot;)&lt;br /&gt;
&lt;br /&gt;
== Definition ==&lt;br /&gt;
The equivalence &amp;#039;&amp;#039;p ↔ q&amp;#039;&amp;#039; is true if &amp;#039;&amp;#039;p&amp;#039;&amp;#039; and &amp;#039;&amp;#039;q&amp;#039;&amp;#039; have the same truth value.  &lt;br /&gt;
It is false if their truth values differ.&lt;br /&gt;
&lt;br /&gt;
== Truth Table ==&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
! p !! q !! p ↔ q&lt;br /&gt;
|-&lt;br /&gt;
| T || T || T&lt;br /&gt;
|-&lt;br /&gt;
| T || F || F&lt;br /&gt;
|-&lt;br /&gt;
| F || T || F&lt;br /&gt;
|-&lt;br /&gt;
| F || F || T&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Examples ==&lt;br /&gt;
* If &amp;#039;&amp;#039;p&amp;#039;&amp;#039; = &amp;quot;2 is even&amp;quot; and &amp;#039;&amp;#039;q&amp;#039;&amp;#039; = &amp;quot;4 is divisible by 2&amp;quot;,  &lt;br /&gt;
  then &amp;#039;&amp;#039;p ↔ q&amp;#039;&amp;#039; is true, since both are true.&lt;br /&gt;
* In Python: &amp;lt;code&amp;gt;p == q&amp;lt;/code&amp;gt; (when p and q are booleans)&lt;br /&gt;
* In Java: &amp;lt;code&amp;gt;p == q&amp;lt;/code&amp;gt; (when p and q are booleans)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
[[Category:Propositional logic (Aussagenlogik)]]&lt;br /&gt;
[[Category: Diskrete Mathematik I (BZG1155pa) 25/26]]&lt;/div&gt;</summary>
		<author><name>Bfh-sts</name></author>
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