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Over what $p$-adic fields $\mathbb{Q}_p$ is the form $\langle3, 7, -15\rangle$ isotropic?

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    Is this a binary form or a diagonal ternary?2011-12-07
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    It's ternary instead of binary.2011-12-07
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    From your questions, you really ought to buy Cassels. It is an inexpensive Dover reprint, http://store.doverpublications.com/0486466701.html2011-12-07

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