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Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles an... | {} |
# Simple algebra
Level pending
Solve the following quadratic equation: (x-a)/(x-b) + (x-b)(x-a) = a/b + b/a. Find the possible integral value of x in this expression.
× | {} |
# Anti-indicator
In Theory of the numbers, one says that a whole positive N is a anti-indicator if the equation $\ varphi \left(X\right) = N \,$, of unknown factor X , does not have a solution, the function $\ varphi \,$ indicating the Indicatrice of Euler. All the odd entireties are anti-indicators, except 1, since, ... | {} |
# PCl3(g) + Cl2(g) <---> PCl5(g) Kc = 0.18 In an initial mixture of 0.300M PCl3 (g), 0.400M Cl2 (g), what are the equilibrium concentrations of all gases?
Dec 20, 2014
The equilibrium concentrations are $\left[P C {l}_{3}\right] = 0.280 M$, $\left[C {l}_{2}\right] = 0.380 M$, $\left[P C {l}_{5}\right] = 0.02 M$.
One... | {} |
# Plasmons in Holographic Graphene
### Submission summary
As Contributors: Ulf Gran · Marcus Tornsö · Tobias Zingg Arxiv Link: https://arxiv.org/abs/1804.02284v5 (pdf) Date accepted: 2020-06-11 Date submitted: 2020-05-27 Submitted by: Gran, Ulf Submitted to: SciPost Physics Discipline: Physics Subject area: High-Ene... | {} |
My Math Forum Converting degrees to radians and finding an area of a sector of a circle
Trigonometry Trigonometry Math Forum
March 31st, 2015, 06:43 AM #1 Member Joined: Feb 2015 From: Planet Zorg Posts: 67 Thanks: 3 Converting degrees to radians and finding an area of a sector of a circle Hi guys, Ok so 52 degre... | {} |
Article
# Big brains stabilize populations and facilitate colonization of variable habitats in birds
• Nature Ecology & Evolution 117061715 (2017)
• doi:10.1038/s41559-017-0316-2
Accepted:
Published online:
## Abstract
The cognitive buffer hypothesis posits that environmental variability can be a major driver of th... | {} |
# What's the most efficient way to find barycentric coordinates?
In my profiler, finding barycentric coordinates is apparently somewhat of a bottleneck. I am looking to make it more efficient.
It follows the method in shirley, where you compute the area of the triangles formed by embedding the point P inside the tria... | {} |
## Achievement First Mathematics
##### v1.5
###### Downloadable Resources
Our Review Process
Learn more about EdReports’ educator-led review process
Showing:
## Report for 4th Grade
### Overall Summary
The materials reviewed for Achievement First Mathematics Grade 4 meet expectations for Alignment to the CCSSM. I... | {} |
Last edited by Nezshura
Friday, July 31, 2020 | History
3 edition of Note on estimation of frequency and number. found in the catalog.
Note on estimation of frequency and number.
Stanislav DornicМЊ
# Note on estimation of frequency and number.
## by Stanislav DornicМЊ
Published in Stockholm .
Written in English
... | {} |
Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic
Nonlin. Processes Geophys., 25, 457-476, 2018
https://doi.org/10.5194/npg-25-457-2018
Nonlin. Processes Geophys., 25, 457-476, 2018
https://doi.org/10.5194/npg-25-457-2018
Re... | {} |
# msmtools.flux.coarsegrain¶
msmtools.flux.coarsegrain(F, sets)
Coarse-grains the flux to the given sets.
Parameters: F ((n, n) ndarray or scipy.sparse matrix) – Matrix of flux values between pairs of states. sets (list of array-like of ints) – The sets of states onto which the flux is coarse-grained.
Notes
The co... | {} |
# LSI for Gaussian measure in $({\mathbb{R}^d})^{\mathbb{Z}^d}$
I am looking for a reference: Does Gaussian measure satisfy Logarithmic Sobolev Inequality (LSI) in $$${\mathbb{R}^d}$$^{\mathbb{Z}^d}$. Thanks.
-
Can you clarify what space you're looking at? Do you mean the space of functions $\mathbb{Z}^d \to \mathbb{... | {} |
# LaTeX table non-split cell with diagonal split colour
Kind of a weird circumstance, but I have a table cell where I need the text to be in the cell normally (non-split) and the cell colour to be split diagonally.
I know how to use slashbox to split the cell, but there doesn't seem to be any way to split the colour ... | {} |
# Find the frequency of exclusive group combinations based on multiple categorical columns in R.
To find the frequency of exclusive group combinations in an R data frame, we can use count function of dplyr package along with ungroup function.
For Example, if we have a data frame called df that contains four grouping ... | {} |
# A magma with the property (xy)(zt) = x(yz)t
Let $$(M,\cdot)$$ be a magma. Does the property $$(x\cdot y)\cdot(z\cdot t) = x\cdot(y\cdot z)\cdot t$$ have a special name? Thanks.
• What does the right-hand side mean? It's lacking a pair of parentheses. – Gro-Tsen Dec 6 at 20:11
• If the magma has a unit, or satisfies... | {} |
C. Santa Claus and Robot
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output
Santa Claus has Robot which lives on the infinite grid and can move along its lines. He can also, having a sequence of m points p1, p2, ..., pm with integer coordinates, do the followi... | {} |
0
Independent Component Analysis
Independent component analysis (ICA) aims to solve problem of signals separation from their linear mixture. ICA is a special case of blind source separation, when separation performed without the aid of information (or with very little information) about the source signals or the proce... | {} |
1. ## Convergence
Hi,
I just want to make sure I've done this right.... I have to find out if this diverges or converges, so I used the ratio test and showed the limit is 1/3, meaning it converges.
$\sum_{n=1}^{\infty} \frac{n!}{n^n}$
I'm not sure how I should do this one...
$\sum_{n=1}^{\infty} ne^{-n}$
Thanks
... | {} |
# Tag Info
6
As requested in the comments, here is a worked example. The main body deals with minimizing $f(x)$ for a specific problem. At the bottom follows a brief discussion of constraints then a brief discussion about the general case. Let's solve the Weighted Maximum Cut problem since this Is a relatively straig... | {} |
# Reading arbitrarily long lines from a file that is redirected as input
So I have a file with a list of dates that are to be redirected as input to stdin and what the program does is it searches for valid dates, appends them to the output file and then appends all the dates in the input file to the output file. In ot... | {} |
## Isotopes of nearlattices.(English)Zbl 0585.06001
Summary: The nature of isotopes of a near lattice is considered. By introducing the notion of a superstandard element n in a near lattice S, it is shown that for a medial element n, the n-isotope $$S_ n$$ is a semi-lattice which is also a nearlattice when n is neutra... | {} |
# zbMATH — the first resource for mathematics
Sufficient conditions for maximally arc-connected digraphs depending on the clique number. (Chinese. English summary) Zbl 07267378
Summary: Interconnection networks are often modeled by digraphs. The arc-connectivity $$\lambda (D)$$ of a digraph $$D$$ is an important measu... | {} |
# Groups and dynamics - Misha Belolipetsky
Arithmetic Kleinian groups generated by elements of finite order Abstract: We show that up to commensurability there are only finitely many cocompact arithmetic Kleinian groups generated by rotations. The proof is based on a generalised Gromov-Guth inequality and bounds for t... | {} |
0
Calculate the MR
Calculate the MR of a doubly reinforced R.C beam of rectangular section of size $300 mm {\times} 450 mm$ deep reinforced with 6 No. 20 mm dia. bars on tension side and case:-
1. 4 no. 20 mm ${\phi}$ on comp side.
2. 5 no. 20 mm ${\phi}$ on comp side.
Assume effective cover of 40 mm on both sides.... | {} |
• entries
383
1075
• views
353419
Innate to Pirate?
677 views
A lot of planning has been underway in the last week. Most of it has been sifting through a couple of years of brainstorm notes for when I got to this point, trying to remember some of the strategies I had jotted out for this point of time. I do not have ... | {} |
# Can the Albanese map be anything?
Sorry for the vague title. This question is about the Albanese map from the variety $M$ of canonically polarized varieties to the set of abelian varieties. (The variety $M$ is not of finite type...)
Let $A$ be an abelian variety of dimension $g$. For which integers $N$ does there e... | {} |
# An algebra problem by Mansi Bahuguna
Algebra Level 1
If $$x + \frac{1}{x} = 2$$, what is the value of $$x$$ ?
×
Problem Loading...
Note Loading...
Set Loading... | {} |
# Selection Sort
April 20, 2019 2 minutes
As with Bubble Sort, Selection Sort is another sorting algorithm that is based on the approach of compare and swap. It also has $O(n^2)$ complexity thus making it un-usable for very large datasets.
Selection Sort is based on the method of identifying the smallest (or largest... | {} |
Allocating Servers in Infostations for Bounded Simultaneous Requests
Bertossi, Alan Albert and Pinotti, Maria Cristina and Rizzi, Romeo and Gupta, Phalguni (2002) Allocating Servers in Infostations for Bounded Simultaneous Requests. UNSPECIFIED. (Submitted)
Preview
PDF
The Server Allocation with Bounded Simultaneous... | {} |
# metal in the calcium hydrogen basis uses
### Aluminum and Aluminum Alloys Casting Problems
Moisture in the atmosphere dissociates at the molten metal surface, offering a concentration of atomic hydrogen capable of diffusing into the melt. The barrier oxide of aluminum resists hydrogen solution by this mechanism, bu... | {} |
# zbMATH — the first resource for mathematics
On property $$M(3)$$ of some complete multipartite graphs. (English) Zbl 1097.05019
Let $$G$$ be a graph and suppose that for each vertex $$v$$ in $$G,$$ there exists a list $$L(v)$$ of $$k$$ colors such that there is a unique proper $$L$$-coloring $$c$$ for $$G$$ (that is... | {} |
Image text transcribed for accessibility: [E. None. 3.3.3]Consider a CMOS process with the following capacitive parameters for the NMOS transistor: COSO, CODO, COX, CJ, mj, Cjun, mjun, and PB, with the lateral diffusion equal to LD. The MOS transistor M1 is characterized by the following parameters: W, L, AD, PD, AS, P... | {} |
## Special Issue of ACM TOMACS on Monte Carlo Methods in Statistics
Posted in Books, R, Statistics, University life with tags , , , , , , , , , , , , on December 10, 2012 by xi'an
As posted here a long, long while ago, following a suggestion from the editor (and North America Cycling Champion!) Pierre Lécuyer (Univer... | {} |
# What schemes support atomic decryption+reencryption
What encryption schemes support this workflow?
Vendor encrypts and publishes information for the client
1. Client generates public and private key
2. Vendor encrypts private information
3. Vendor publishes that
ENCRYPT(PRIVATE_INFORMATION, CLIENT_PUBLIC_KEY) --> ... | {} |
Mdframed two color on background and text as watermark. (The colored box). Why is "doofe" pronounced ['doːvɐ] insead of ['doːfɐ]? (alternatives to mdframed are welcome of course) Is there a way to refer back to each box with one background color (including labeling them somehow)? It only takes a minute to sign up. var ... | {} |
# Dynamic Online Learning Applied to Fast Switched-Stub Impedance Tuner for Frequency and Load Impedance Agility in Radar Applications
Publisher: IEEE
Abstract: Switched-stub tuner topologies show promise for use in real-time tuning of high-power amplifiers in radar transmitter arrays. High-power switches can be used... | {} |
# Does Nelson try to prove PA inconsistent directly?
Edward Nelson is known for his serious attempts to show that Peano axioms, and sometimes even weaker theories, are inconsistent. I wasn't able to find Nelson's papers anywhere, so I wanted to ask a question about structure of his proofs:
Did Nelson attempts try to,... | {} |
limit proving
Recommended Posts
agghh i hate this kind of maths mainly because i am really bad at it
"this kind" being of course the proving of limits using deltas and epsilons
can anybody help me or give some advice with this stuff?
Cheers
Sarah
Share on other sites
Do you have a specific example in mind? I as... | {} |
#### Vol. 314, No. 1, 2021
Recent Issues Vol. 315: 1 2 Vol. 314: 1 2 Vol. 313: 1 2 Vol. 312: 1 2 Vol. 311: 1 2 Vol. 310: 1 2 Vol. 309: 1 2 Vol. 308: 1 2 Online Archive Volume: Issue:
The Journal Subscriptions Editorial Board Officers Contacts Submission Guidelines Submission Form Policies for Authors ISSN: 1... | {} |
·3 mins
## Function results can’t be assigned to #
Let’s say we have a “normal” programming language such as Python:
def foo(a, b):
return a + b
foo(1, 2) = 10 # <- This is obviously not true
In my mental model, foo(1, 2) evaluates to 3 first. Therefore, the line in question is the same as 3 = 10, which doesn’t w... | {} |
# Let f be the function given by f x x which of the
• Notes
• 5
This preview shows page 2 - 5 out of 5 pages.
5.Let fbe the function given by ( )fxx=. Which of the following statements about fare true? I.fis continuous at 0x=II.fis differentiable at 0x=III. fhas an absolute minimum at 0x=. . . (A) I only (B) II only... | {} |
# For a circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium super elevation (for equal pressure on inner and outer wheel) would be?
Free Practice With Testbook Mock Tests
## Options:
1. 21.3
2. 6.3
3. 7.0
4. 4.6
### Correct Answer: Option 2... | {} |
#### Updater through Remote XML: Advice
I am implementing a very simple check routine that goes to my website and
The XML file basically contains all info for my apps and their current
status. All I need to do is just read
the version node and compare it to the current node and then advise the user
to visit the websit... | {} |
# How Do I Write A Petition
How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition.
How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Petition. How Do I Write A Pet... | {} |
## Calculus: Early Transcendentals (2nd Edition)
The value of the derivative is $$\left.\frac{dc}{dt}\right|_{s=25}=\frac{1}{5}.$$
Using the definition of the derivative for $s=25$ we have $$\left.\frac{dc}{dt}\right|_{s=25}=\lim_{h\to0}\frac{c(25+h)-c(25)}{h}=\lim_{h\to0}\frac{2\sqrt{25+h}-1-(2\sqrt{25}-1)}{h}=\lim_{... | {} |
# Humans of Simulated New York
04.11.2016 | projects
For our month-long DBRS Labs residency, Fei and I built the beginnings of a tool set for economy agent-based simulation. My gut feeling is the next phase of this AI renaissance will be around simulation. AlphaGo's recent victory over the Go world champion - a landm... | {} |
If you're seeing this message, it means we're having trouble loading external resources on our website.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
# Analyzing unbounded limits: rational function
AP.CALC:
LIM‑2 (EU)
,
LIM‑2.D (LO)
,
LIM‑2.D.1 (EK... | {} |
# zbMATH — the first resource for mathematics
A note on tensor products of polar spaces over finite fields. (English) Zbl 0836.51004
The author’s abstract: “A symplectic or orthogonal space admitting a hyperbolic basis over a finite field is tensored with its Galois conjugates to obtain a symplectic or orthogonal spac... | {} |
# How do you solve the quadratic equation by completing the square: y^2 + 16y = 2?
Jun 14, 2018
$y = - 8 \pm \sqrt{66}$
#### Explanation:
to complete the square you use the formula:
$a {x}^{2} + b x + c$
a must equal 1
$c = {\left(\frac{b}{2}\right)}^{2}$
the completed square is:
${\left(x + \frac{b}{2}\right)... | {} |
$2\times 2$ matrices over complex numbers
I am trying to solve this problem. If $A$ is a $2 \times 2$ matrix with complex entries, then $A$ is similar over $\Bbb C$ to a matrix of one of the two types
$$M= \left[ {\begin{array}{cc} a & 0\\ 0 & b\\ \end{array} } \right],$$ $$M= \left[ {\begin{array}{cc} a & 0 \\ 1 & a ... | {} |
# How do you find the equation for the parabola with the given Vertex (4,-1), point (-2,35)?
Aug 24, 2015
Find the equation of the parabola
Ans: y = 9x^2 - 72x + 143
#### Explanation:
Equation of the parabola : $y = a {x}^{2} + b x + c$. Find a, b, and c
Vertex (4, -1)
x-coordinate of vertex: $- \frac{b}{2 a} = 4$... | {} |
## Screenshot shortcuts on Linux (Ubuntu, CentOS, RedHat)
This post provides shortcuts for taking screenshots on Linux (including Ubuntu, CentOS, and RegHat).
The command is the same for Ubuntu, CentOS, RedHat. (Check HERE for screenshot shortcuts on Mac.)
• ### Using Gnome Screenshot
• Press PrtScn to take a full... | {} |
# Homology of $S^n - S^k\vee S^\ell$
Does anyone know a good trick to computing homology groups of the sphere minus the wedge of two spheres of possibly different dimension $S^n \setminus S^k\vee S^\ell$ ? Any particular $k$ and $\ell$ is not so bad, but the general case has so many cases. Can one avoid this with a so... | {} |
# 0.3 Gravity and mechanical energy (Page 6/9)
Page 6 / 9
$KE=\frac{1}{2}m{v}^{2}$
Consider the $1\phantom{\rule{2pt}{0ex}}\mathrm{kg}$ suitcase on the cupboard that was discussed earlier. When the suitcase falls, it will gain velocity (fall faster), until it reaches the ground with a maximum velocity. The suitcase... | {} |
# Repeated pulses and contrast
In this section we investigate the effect of repeating the pulses, meaning that in the pulse starting time the magnetization does not equal to its equilibrium value but it is the result of the previous sequences. First we deal with FID. We measure the time from the first 90° pulse applie... | {} |
# zbMATH — the first resource for mathematics
Automated generation of search tree algorithms for hard graphs modification problems. (English) Zbl 1090.68027
Summary: We present a framework for an automated generation of exact search tree algorithms for NP-hard problems. The purpose of our approach is twofold – rapid d... | {} |
# Forum: ARM programming with GCC/GNU tools ARM pessimizer
Author: Paul D. (pderocco) Posted on: 2014-03-19 22:26
Rate this post
0 ▲ useful ▼ not useful
I'm using arm-none-eabi-gcc 4.7.3 or 4.8.3 from launchpad.net, compiling
for an M4 with the following options:
-mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv... | {} |
# Weak Lefschetz theorem for Lef line bundles
I'm studying
M. A. A. de Cataldo, L. Migliorini - The Hard Lefschetz Theorem and the topology of semismall maps, Ann. sci. École Norm. Sup., Serie 4 35 (2002) 759-772.
The premises are the following.
Let $$f:X\to Y$$ be a proper holomorphic (non constant) map of irreduc... | {} |
# Density
Density (symbol: ρ - Greek: rho) is a quality of being dense or, how thick a thing is. The higher an object's density, the stupider it is; a denser object (such as Paris Hilton) will perform more stupid acts in a day than a less dense substance (such as Stephen Hawking).
The SI unit of density is the stupid... | {} |
# Article
Full entry | PDF (0.3 MB)
Keywords:
Gini coefficient; finite sums; estimates
Summary:
The scope of this note is a self-contained presentation of a~mathematical method that enables us to give an absolute upper bound for the difference of the Gini coefficients $\left |G(\sigma _1,\dots ,\sigma _n)-G(\gamma _... | {} |
# Diameter of Minimal Separators in Graphs
1 COATI - Combinatorics, Optimization and Algorithms for Telecommunications
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - COMRED - COMmunications, Réseaux, systèmes Embarqués et Distribués
Abstract : We establish general relationships between the topologi... | {} |
# Thread: covariance, a normal vector (X,Y) and the distribution of Z = X - 2Y + 1
1. ## covariance, a normal vector (X,Y) and the distribution of Z = X - 2Y + 1
hi, I am preparing for a final in my least favorite class and could use a little help with this preparation problem.
Initially X and Y were normal with giv... | {} |
# NCERT Solutions Class 8 Science Chapter 14 Chemical effects of electric current
## NCERT Solutions for Class 8 Science Chapter 14 Chemical effects of electricity and current
Often your parents ask you to not touch dysfunctional electrical appliances with wet hands. Or while turning on or off electrical appliances, ... | {} |
Show that the change in entroy is
1. Mar 17, 2006
endeavor
Show that the change in entropy for a cycle of a heat engine is
$$\Delta S = \frac{Q_{cold}}{T_{cold}} - \frac{Q_{hot}}{T_{hot}}$$
2. Mar 17, 2006
Hootenanny
Staff Emeritus
Please show some working or thoughts...
3. Mar 17, 2006
endeavor
$$W = Q_{in} -... | {} |
# Temporal Segment Networks: Towards Good Practices for Deep Action Recognition
2 Aug 2016 · Limin Wang, , , , , , ·
Deep convolutional networks have achieved great success for visual recognition in still images. However, for action recognition in videos, the advantage over traditional methods is not so evident. Th... | {} |
## Ride share blowout sale
A certain ride sharing company sent me the following offer: pay $20 up front and your rides will be$4.50 (\$2.50 for the carpool version) for 28 days. Is this a good deal? Let’s find out!
## Power loss using Wilcox
rblogging
I know this is an answered question, but I was curious how detri... | {} |
# Weaponized Riddles
Ian Peleaga was on a quest. It was said arms dealers had a huge operation here in southern Atlanta and as an FBI agent, it was his job to expose it.
He had traced some dealers to an abandoned house at the edge of Douglas. The crime boss had taken a liking to him and wanted him to follow them. Ian ... | {} |
#### Archived
This topic is now archived and is closed to further replies.
# "Cannot convert parameter 1 from 'A' to 'A'" ?
This topic is 5247 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.
## Recommended Posts
Hi everyone. I just added some code, and MSVC++ 6 ... | {} |
# Central Limit Theorem
March 29, 2018
Pierre-Simon Laplace, 1749 -1827
The Central Limit Theorem states that the sums (or averages) of sets of random variables will tend toward having a Normal distribution as N increases. It was the French mathematician Laplace who proved this for a number of general cases in 1810 ... | {} |
# MAA Found Math 2011 - Week 26
MAA Found Math: Benyavut Jirasutayasuntorn snapped this photo at Temple Israel in Stockton, California. He wrote, "Infinity and beyond. This temple wall depicts the Hebrew letter, 'Aleph'. Mathematically they are a sequence of numbers which are used to represent the cardinality or size ... | {} |
Seminars
3:30 pm, Seminar Hall Some topics in Submodular Optimization - a survey Dr. Sambuddha Roy IBM Research, New Delhi. 26-02-14 Abstract This survey talk will consider submodular function optimization. A submodular function $f$ is a set function such that for any sets $A$ and $B$, it holds that $f(A) + f(B) \geq... | {} |
Galois Groups An algebraic field is, by definition, a set of elements (numbers) that is closed under the ordinary arithmetical operations of addition, subtraction, multiplication, and division (except for division by zero). For example, the set of rational numbers is a field, whereas the integers are not a field, becau... | {} |
07 Mar
This will join all lines of a file together. Sometimes I have a list of something in a file, one line per item and want to convert it to a comma(colon,tab)-separated line (with no trailing separator of course) that can be used as a command-line parameter to some other tool.
perl -e '@_=; chomp(@_); print join... | {} |
# Finding Cluster Points/Accumulation Points
#### brooklysuse
##### New member
Find the set of cluster points for the set A := {(−1)n/n : n ∈ N}. Justify your answer with
proof.
I believe 0 is a cluster point but I can't figure out how to prove this, or how to prove any other point is not.
Any quick help would be a... | {} |
A dataset containing CPR's for 41 flights flying over Europe. One on 4th , 19 on 5th and 21 on 6th Feb 2017.
A dataset containing CPR's for 41 flights flying over Europe. One on 4th , 19 on 5th and 21 on 6th Feb 2017.
cprs
cprs
Format
A data frame with 53940 rows and 10 variables:
cpm_id
CPR Message (CPM) line n... | {} |
# Homework Help: Alternating series
1. Apr 2, 2005
### tandoorichicken
I know that a series such as
$$\sum_{n=1}^{\infty} \frac{1}{\sqrt{n}}$$
is divergent. Is this also the case for an alternating version of the same series, i.e.,
$$\sum_{n=1}^{\infty} \frac{(-1)^{n-1}}{\sqrt{n}}$$
?
2. Apr 2, 2005
### dexter... | {} |
1. Jul 16, 2007
### daniel_i_l
1. The problem statement, all variables and given/known data
You have the function f:R->R and f(x) = f(x+k) where k is in R and k>0.
Prove or disprove:
1) If f is continues at x0 then it's also continues at x0 + k
2)If the limit of f at infinity is 0 then f(x)=0 for all x in R.
2. Rele... | {} |
# Lesson goal: Combining exponents
Previous: Birthday Surprise | Home | Next: Multiplying a polynomial by a monomial
One of the coolest advances of doing math on the computer, is the computer's ability to do symbolic math. This means the computer can do algebra, which means properly handling the math for all of the $... | {} |
Lagrangian Dynamics of an inverted Spherical Cart Pendulum
Introduction
I have to come up with a PD-controller for an inverted Spherical Cart Pendulum, therefore I tried to compute the Dynamics of such a Pendulum.
The Spherical Cart Pendulum is a hybrid between the Cart Pole and the Spherical Pendulum. The underlyin... | {} |
# Math Help - Theorem on quadrilaterals
Hi, all. Is this a known theorem, meaning you've seen it stated somewhere? A simple quadrilateral whose minimum distance between vertices is 1 and whose maximum distance is sqrt(2) is a unit square.
2. Originally Posted by JakeD
Hi, all. Is this a known theorem, meaning you've ... | {} |
# need a help to simplify
• September 11th 2008, 11:46 PM
dimuk
need a help to simplify
$a_n(G)=\frac{t_n(G)}{(n-1)!}$ and $h_n(G)=\sum _{k=1}^n {n-1 \choose k-1} t_k(G)h_{n-k}(G).$ Then need to remove $t_k(G)$ and obtain $a_n(G)=\frac{1}{(n-1)!} h_n(G)-\sum _{k=1}^n \frac{1}{(n-k)!}h_{n-k}(G)a_k(G).$
• September 12th... | {} |
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Heavy Ions
J/$\psi$ photoproduction and the production of dileptons via photon-photon interactions in hadronic Pb-Pb collisions measured with ALICE
R. Bailhache
Full text: pdf
Pre-published on: November 21, 2022
Published on:
Abstract
Photo... | {} |
## Differential and Integral Equations
### Existence of non-topological solutions for a nonlinear elliptic equation arising from Chern-Simons-Higgs theory in a general background metric
Kazuhiro Kurata
#### Abstract
In this paper we show the existence of non-topological 0-vortex and 1-vortex solutions for a nonline... | {} |
# Control Engineering: Why are the Equation Error and Output Error different?
When modelling a system you must first estimate the form of the transfer function (order, time delay etc.), and then estimate the parameters (coefficients for the transfer function).
A common way to estimate these parameters is to formulate... | {} |
anonymous one year ago http://media.education2020.com/evresources/2004-04-01-02-00_files/i0130000.jpg Find the unknown side length, x. Write your answer in simplest radical form
1. mathstudent55
|dw:1440193477028:dw|
2. mathstudent55
We are looking for x.
3. mathstudent55
What do the circled marks mean? |dw:14401... | {} |
## anonymous 3 years ago Which is the simplified form of 12 times f to the sixth power times g all over 16 times g squared.? A:f to the sixth power over 4 times g squared. B:3 times f to the sixth power all over 4 times g squared. C:3 times f to the sixth power all over 4 times g. D:f to the sixth power over 4 times g.... | {} |
#### Vol. 271, No. 1, 2014
Recent Issues Vol. 314: 1 2 Vol. 313: 1 2 Vol. 312: 1 2 Vol. 311: 1 2 Vol. 310: 1 2 Vol. 309: 1 2 Vol. 308: 1 2 Vol. 307: 1 2 Online Archive Volume: Issue:
The Journal Subscriptions Editorial Board Officers Contacts Submission Guidelines Submission Form Policies for Authors ISSN: 1... | {} |
# Lesson 16
Applying Volume and Surface Area
### Lesson Narrative
In this second lesson on applying surface area and volume to solve problems, students solve more complex real-word problems that require them to choose which of the two quantities is appropriate for solving the problem, or whether both are appropriate... | {} |
# Exercise 2 | Quantum Theory and Atomic Structure
How many electrons can be specified by the following combinations of quantum numbers?
- n = 2
- n = 3, l = 2
- n = 3, l = 1, ml = 0
- n = 4, l = 2, ml = -1, ms = ½
- n = 2 ⇒ 2 subshells: 2s and 2p ⇒ 4 orbitals
⇒ 4 x 2 e- = 8 e-
- n = 3, l = 2 ⇒ 1 subshell: 3d ⇒ ... | {} |
# Higher order Derivative Ques
• Jan 11th 2010, 02:19 PM
Higher order Derivative Ques
show that the equation $f" (x) + 4 f'(x) + 4 f(x) = 0$ is satisfied if $f(x) = (3x-5)e^-2x$
What is this question asking me to do? I know I will need to find the first and second derivative but where does the + 4 part fit in?
• Jan ... | {} |
# Not Paying liteinvestgroup - liteinvestgroup.com
##### Active Member
history of foundation
Lite Invest Group it is a company which is specialized on trade in the currency and fund markets. Our collective works in the market since January, 2009. The idea of creation of project belongs to Alex Konovalov, who at the ... | {} |
# Understanding the fragility index
## Summary
This post reviews the fragility index, a statistical technique proposed by Walsh et. al (2014) to provide an intuitive measure of the robustness of study findings. I show that the distribution of the fragility index can be approximated by a truncated Gaussian whose expec... | {} |
# Question regarding speed of causality and speed of light
Recently I came across a question regarding to why the speed of light and the speed of causality are the same. Link-Why is the speed of causality equal to the speed of light? I came up with an explanation, but I am not sure if it is right. I thought that we co... | {} |
## Introduction
Bacterial lipids are the key constituent segregating cellular components from the external environment. Bacterial lipids are highly diverse yet there is currently little understanding of the benefits that this diversity provides [1]. Glycerophospholipids are by far the best studied lipids in bacteria a... | {} |
Let $f: R \rightarrow R[X]$ be the natural map, and let $I$ be an ideal of $R$. Show that $I \in {\rm Spec}(R) \iff I^{e} \in {\rm Spec}(R[X])$.
This is exercise in Commutative Algebra:
Let $$R$$ be a commutative ring and let $$X$$ be an indeterminate; use the extension and contraction notation of 2.41 in conjunction... | {} |
SMTLIB - Maple Help
SMTLIB (.smtlib) File Format
SMTLIB file format
Description
• SMT-LIB (Satisfiability Modulo Theories LIBrary) is a interface language intended for use by programs designed to solve SMT (Satisfiability Modulo Theories) problems.
• It is reminiscent of LISP in design and appearance.
• The SMTL... | {} |
## Mathematics Seminar Series 2018
Year 2018 2019
Title: Enumeration formulae for self-dual, self-orthogonal and complementary-dual cyclic additive codes
Speaker: Dr. Anuradha Sharma, Associate Professor, IIIT-Delhi
Date: November 15, 2018 (Thursday)
Abstract: Cyclic additive codes over finite fi... | {} |
# 4.15.2. Working with Data Sets¶
The following features mainly work with the Data Set.
## 4.15.2.1. Data Set Sensitivity¶
Data Sets that require a large number of jobs for the evaluation will usually be the bottleneck of every parameter optimization. This class provides the possibility to estimate the diversity of ... | {} |
Browse Questions
# Four charges are arranged at the corners of a square ABCD of side d, as shown in Figure. Find the work required to put together this arrangement.
Since the work done depends on the final arrangement of the charges, and not on how they are put together, we calculate work needed for one way of puttin... | {} |
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