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Given a representable morphisms $f:\mathcal{X}\to\mathcal{Y}$ of Artin stacks, do the fibers of $f$ have always positivenonnegative dimension? If not, can you give me some examples of what can happen?
Given a representable morphisms $f:\mathcal{X}\to\mathcal{Y}$ of Artin stacks, do the fibers of $f$ have always positive dimension? If not, can you give me some examples of what can happen?
Given a representable morphisms $f:\mathcal{X}\to\mathcal{Y}$ of Artin stacks, do the fibers of $f$ have always nonnegative dimension? If not, can you give me some examples of what can happen?
Given a representable morphisms $f:\mathcal{X}\to\mathcal{Y}$ of Artin stacks, do the fibers of $f$ have always positive dimension? If not, can you give me some examples of what can happen?
