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Step right up to play Math Stack! Use it to practice math. You can add, subtract, multiply, or divide. Tap the falling blocks to answer the math question. Get points to finish the level. Be …

2 days ago · ∫π 01 + cos(2cotϑ) 2 dϑ sin2.

Prove that this composition is differentiable. f: A ⊆ R2 → f: A ⊆ R 2 → R. Prove that the sequence (xn)n≥ (x n) n ≥ 1 is convergent. (xn+1 −xn)(xnxn+1 −) ≤ n + 1 n + 1. P(z) = clzl P z z l. How …

Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's built and run by you as part of the Stack Exchange …

In mathematics a stack or 2-sheaf is, roughly speaking, a sheaf that takes values in categories rather than sets. Stacks are used to formalise some of the main constructions of descent …

How do the singular values of a Hankel matrix, generated by some data time series, change when we add/remove rows and columns? How should one understand $R \mathcal {H}om_ …

STACK is an online assessment system for mathematics and STEM, designed to enable students to answer questions with a mathematical expression, such as a polynomial.

Step right up to play Math Stack! Use it to practice math. You can add, subtract, multiply, or divide. Tap the falling blocks to answer the math question. Get points to finish the level. Be …

We find the formulation above the most convenient way to think about a stack. Namely, given a category over C in order to verify that it is a stack you proceed to check properties (1), (2) and …