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Mathematics : Recent Questions and Answers (Page 20)

Find answers to your questions about Mathematics or help others by answering their Mathematics questions.

find $f(n)$ that isn't little $o(n^2)$ and isn't $w(n)$

im having a problem with a question that tells me to find $f(n)$ so that $f(n) neq o(n^2)$ meaning also that $lim_{rightarrowinfty} frac{f(n)}{n^2} neq 0$ and ...

Asked on 12/25/2021 by Yuval Eliav

1 answer

I need help with Dudley problem 4.2.6

Theorem 4.2.8 in Dudley's Real Analysis and Probability states:Given a set $X$, a measurable space ($Y$, $mathcal{B}$), and a function$T$ from $X$ into ...

Asked on 12/25/2021

0 answer

Point of intersection of pair of straight lines

We have our general equation is second degree in two variables:$ax^2+2hxy+by^2+2gx+2fy+c=0$ Let's say this represents a pair of straight lines Our professor told that we could find the...

Asked on 12/25/2021 by DatBoi

1 answer

Find the area between $f(x) = x^2+3x+7 $ and $g(x) = xe^{x^3+4}$ for $x in [3,5]$.

Calculate the area between the two functions, $f(x)$, $g(x)$, for $x in [3,5]$.$$f(x)=x^2+3x+7$$$$g(x)=xe^{x^3+4}$$To determine the area between the functions I used the formula...

Asked on 12/25/2021

2 answer

Having an estimate $hat{p}$ of $p$, what can we say about $1-hat{p}$?

First, let us define:$epsilon$-additive approximation:$$hat{p} in big[ p -epsilon, p + epsilon big]$$$epsilon$-multiplicative approximation:$$hat{p} in big[ p cdot (1-epsilon), ...

Asked on 12/25/2021

1 answer

Set of subspaces of vector space

Let $V$ be a (real) vector space. Consider the set $mathscr{V}$ consisting of all subspaces of $V .$ Equipping $mathscr{V}$ with the addition of subspaces, is...

Asked on 12/25/2021 by maths student

1 answer

If $x$ is a fixed point of a continuous function $f$, there is an open neighborhood $N$ of $x$ with $f(N)subseteq N$

Let $Omega$ be an open subset of a topological space $E$ and $xinOmega$ be a fixed point of a continuous function $f:Omegato E$.How can we show...

Asked on 12/25/2021

1 answer

On closed balls of a subset of a metric space

Let $X$ be a vector space and let $A$ be a subset of $X$. Let $d$ be a metric on $X$ which is not induced...

Asked on 12/25/2021 by serenus

0 answer

What is known about primorial and factorial minus one prime?

$324$ is an example of an integer such that both $324!-1$ and $primorial(324)-1$ are primes.Are there other examples?Is there some condition to be $n!...

Asked on 12/25/2021 by Enzo Creti

0 answer

Ring and elements with multiplicative decompositions with same sum

Is there any commutative unitary ring $(R,+,cdot,0,1)$, that is not an integral domain, with an element $xneq 1,0$ that presents at least two distinct multiplicative "proper" decompositions (i.e....

Asked on 12/25/2021

0 answer

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