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I am trying to write a logic equation with symbols and when I use \equiv everything afterwards is italics and does not allow spacing, even if I go to a new line.

Example:

p \to q \equiv \lnot q \to \lnot p

Output:

p → q ≡ ¬q→¬p

I have attempted to put the \equiv between $ but that also didn't work.

Also if I try to type on the next line it doesn't go to the next line, the only way I can go to the next line is by using \\ and even when I do that the next line is still italicized and there are no spaces.

I am new to LaTeX and stackexchange but can someone please help me out?

Thanks

pechs
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    could you add a MWE? – Raaja_is_at_topanswers.xyz Jan 17 '19 at 05:59
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    You need $p \to q \equiv \lnot q \to \lnot p$. – Werner Jan 17 '19 at 06:08
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    You have to put the expression between dollar signs, if you don't want p and q to be in italic than put them in \mathrm{} – Edoardo Serra Jan 17 '19 at 09:07
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    Welcome to TeX.SX! Internet sites like this one are great for providing brilliant solutions to tough issues, but if you accept a piece of unsolicited advice, you should not try to use them as a substiute for technical manuals. In particular, I recommend that you don’t try to write LaTeX code without having read at least an introductory guide. – GuM Jan 17 '19 at 12:43

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