Over what $p$-adic fields $\mathbb{Q}_p$ is the form $\langle3, 7, -15\rangle$ isotropic?
Isotropy over $p$-adic numbers
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p-adic-number-theory
quadratic-forms
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0Is this a binary form or a diagonal ternary? – 2011-12-07
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0It's ternary instead of binary. – 2011-12-07
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0From your questions, you really ought to buy Cassels. It is an inexpensive Dover reprint, http://store.doverpublications.com/0486466701.html – 2011-12-07