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I'm confused between 2 XOR gate symbols, they have a minor difference but I'd still like to know if they truly are identical.

One looks like - this

The other, like this

Notice, how for one of them the input lines are connected all the way and for the other, it's not. Are they both identical, as I suspect or is there something I'm not aware about?

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  • $\begingroup$ I cannot see your images. $\endgroup$ Commented Jul 2, 2019 at 13:52
  • $\begingroup$ @YuvalFilmus Really? They should work fine, might be an issue on your side. $\endgroup$ Commented Jul 2, 2019 at 14:05
  • $\begingroup$ They work for me. $\endgroup$ Commented Jul 2, 2019 at 16:17

2 Answers 2

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There is a standard for this, ANSI/IEEE Std 91a-1991. The second version is what that standard gives for the "distinctive shape symbol" (5.1-11). So if you want to know what one is "correct", it's arguably that.

ANSI/IEE Std 91a-1991 EOR symbol

The other version is not the standard, but it's extremely common and everyone knows what you mean by it. But it's not distinct.

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This is akin to asking if $B$ and $\mathcal{B}$ are really the same letter and, if not, which is correct. It makes no difference.

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