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Consider this question: Parallel arrows along a curve with tikz.

The OP's code is clearly not compilable. The preamble of the code is not shown.

However, we can add a single line

\documentclass[tikz, margin = 3mm]{standalone}

to the code to make it compilable; and it produces this figure:

enter image description here

So, in cases like this, should I add the above line to the code and add the picture to the question? Or should I suggest like "Please add an MWE" and wait for the OP to edit the question?

marked as duplicate by CarLaTeX, user156344, Community Jan 12 at 9:15

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