Ethereum matrix 44
although the price of Ethereum continues to decline, there are still many investment opportunities. Nowadays, many people invest in Ethereum through virtual currency trading in the realm Kingdom, which is not affected by the rise and fall of prices, but also can invest less money in the shortest time to obtain more income.
as of August 23, 2019, Ethereum price: the highest price in 24 hours is ￥ 1922.07 ≈ 0.0365btc, the lowest price in 24 hours is ￥ 1876.36 ≈ 0.0356btc, the highest price in history is ￥ 10047.07 ≈ 0.1906btc, and the lowest price in history is ￥ 2.95 ≈ 0.0001btc 2. Turnover of the exchange: 5.944 billion, 0.62%, 24 hours up and down precautions: 1. The co founders of Ethereum believe that competition will be positive, and the world absolutely needs to see that indivial freedom is respected, and that they can freely access global IT tools. The data of these tools are not controlled by companies or companies that can use digital transformation to increase data
Thank you for your recommendation. Here I would like to share with you the following:
forsage international crowdfunding, the revolutionary smart contract technology of the new generation platform, originated from the development of Russian technical team, provides distributed market participants with the ability to directly engage in personal and commercial transactions. The smart contract of forsage distributed global shared matrix project is open and can always be viewed on the Ethereum blockchain. These are real smart contracts, which will be implemented on the Ethereum public chain forever without any third party tampering. The global shared matrix project is completely decentralized, aiming to preach Ethereum, so that more players can know Ethereum, smart contracts and forsage code btshijie
what is Ethereum
Ethereum is often compared with bitcoin, but the situation is different. Bitcoin is a kind of cryptocurrency and distributed payment network, which allows bitcoin to be transferred between users
the Ethereum project has a bigger goal. As Ethereum said, "Ethereum is a distributed platform running smart contracts.". These smart contracts run on "Ethereum virtual machine", a distributed computing network composed of all devices running Ethernet nodes
"distributed platform" means that anyone can set up and run an Ethereum node just as anyone can run a bitcoin node. Anyone who wants to run "smart contracts" on nodes must pay the operators of these nodes in ether, which is a cryptocurrency related to Ethereum. Therefore, the person running the Ethernet node provides computing power and gets paid in the Ethernet, which is similar to the way that the person running the bitcoin node provides hash power and pays in bitcoin
in other words, although bitcoin is only a blockchain and payment network, Ethereum is a distributed computing network, and its blockchain can be used for many other things. Details are provided in the Ethereum white paper
what is smart contract
smart contracts are applications that run on Ethereum virtual machines. This is a distributed "world computer" with computing power provided by all Ethereum nodes. Any node providing computing power will pay in ether digital currency as a resource
they are named smart contracts because you can write "contracts" that execute automatically when you meet the requirements
for example, imagine building a KickStarter like crowdfunding service on Ethereum. Someone can set up an Ethereum smart contract to pool funds to others. The smart contract can be written as follows: when $100000 of currency is added to the pool, it will be sent to the recipient. Or, if the $100000 threshold is not reached within a month, all currencies will be returned to the original holder of the currency. Of course, this would use ether instead of dollars
all this will be done according to the smart contract code, which can automatically execute the transaction without the need for a trusted third party to hold the currency and sign the transaction. For example, KickStarter charges 5% above the 5% payment processing fee, which means it will charge $8000 to $10000 for a $100000 crowdfunding project. Smart contracts don't have to pay a fee to a third party like KickStarter
smart contracts can be used for many different things. Developers can create smart contracts to provide functions for other smart contracts, similar to the way software libraries work. Alternatively, smart contracts can simply be used as applications to store information on the Ethereum blockchain
in order to really execute the smart contract code, someone has to send enough Ethernet tokens as the transaction fee - how much depends on the required computing resources. This costs the Ethereum nodes to participate and provide computing power. The global shared matrix project, which is completely decentralized, aims to preach Ethereum and let more players know Ethereum, smart contracts and forsage code btshijie
A vigorous "blockchain movement" is sweeping like a wave, threatening everyone around. From last year to this year, the debate over blockchain has never stopped. Is blockchain, as its advocate Chen Weixing said, the "spring of mankind", the "antidote to the global economic collapse", or as his doubter Zhu Xiaohu said, "blockchain is a fake outlet, and there is nothing left except currency speculation"
we think that this instry needs standards, otherwise we will talk about blockchain for a long time, and the concept of talking is not the same, and even some enterprises claim to make their own blockchain, and they just change the database. With the authoritative standard of trusted blockchain, we can screen out the enterprises that obviously sell dog meat, and let the enterprises that really do blockchain technology get endorsement
Ce: how does Tencent solve the problem of talent scarcity in the blockchain field
CAI Yige: our technical talents are basically transformed from Tencent. The blockchain instry is very new, and few people have done blockchain. Just like the arrival of mobile network in those years, it's very difficult for you to recruit Android and IOS developers. We all cultivate ourselves
light wallets are good for imtoken, geekwallet, kcash, Cobo, etc.
Hardware wallets are good for ledger, trezor, etc., which involve large amount of digital currency or hold for a long time. Generally, hardware wallets are recommended
big body introces these personal good light wallets
1. Imtoken:
is a mobile light wallet app, which supports Eth and Ethereum erc2.0 standard tokens (such as EOS, DGD, SNT, qtum)
advantages: as Ethereum series light wallet, mtoken supports all the tokens of Ethereum erc2.0 standard, can control the miner's fee of each coin, can set the collection amount, and has convenient transaction record query, refreshing interface and easy operation, so it is suitable for ICO investors who need to receive a variety of erc2.0 standard tokens and trade infrequently
disadvantages: 1. The "discovery" mole of the wallet is not intuitive enough. 2. The tokens that can only be stored on the Ethereum platform, such as BTC and Neo, can't be stored. At the same time, the bifurcations of bitcoin can't be stored
2. Geek wallet
geek wallet is a simple and convenient light wallet, which supports the storage and management of mainstream digital currency assets such as bitcoin (BTC), lightcoin (LTC), Ethereum (ETH), EOS, usdt, etc. Using bip44 mnemonics, local private key, off-line signature and other security mechanisms, as well as mobile phone and computer al backup strategy, completely solve the loss of digital currency assets caused by hacker attacks, virus infection, mobile phone loss, forgetting mnemonics and other ways, and provide users with online Multi Chain digital assets one-stop management service. The platform also has tiaoshao market, which can carry out token trading of physical assets on the chain
advantages: it has high security factor, adopts local private key security mechanism, as well as mobile phone and computer al backup strategy, supports the current mainstream currency, and has a jump market on the platform, which can carry out token trading of physical assets on the chain
disadvantages: usdt transaction must use 0.0001 BTC as transaction handling fee, does not support some small currencies, page optimization is good, but the function is relatively few
3. Kcash
kcash is also a light wallet. At present, it supports BTC, ETH, LTC, etc, act and digital currency based on Ethereum and achain smart contract platform. Kcash has cross chain and cross contract technology, and the supported currencies are still increasing
advantages: as a Multi Chain Wallet, kcash supports multiple types of digital currencies and is very friendly to users who invest in multiple series of digital currencies. In addition, kcash also has the function of sending red packets, and in the future, it will launch currency transaction, bank card connection and other functions
deficiency: too many features lead to poor usability. In addition, there are some compatibility problems with Android versions. Some Android models will flash back when opening apps< Cobo
4. Cobo
Cobo is a professional digital asset management wallet, which can help you store your assets safely. The unique POS gain can help you increase the value of your assets. It supports more than 20 kinds of digital assets including eth, EOS and TRX, as well as more than 500 kinds of tokens
advantages: Cobo security is in the lead in the same level, using multiple security verification, hot and cold separation storage, HSM multi signature, Cobo provides you with stable income through intelligent voting, dpos vote pool, POS mining digital asset gain matrix
disadvantages: poor page optimization, complex functions, a little difficult to get started, and there is also a flash back problem of Android version
5. Ledger
Hardware wallet, which supports eth, BTC, zcash and other mainstream currencies, uses encryption chip technology to build security solutions for users, and is used to protect users' digital assets and block chain application security. This is a hardware bitcoin wallet specially designed for consumers. It provides enterprise level security hardware moles and hardware procts supporting the Internet of things
6, ledger
Hardware wallet, support eth, BTC, zcash and other mainstream currencies; Using encryption chip technology to build security solutions for users to protect users' digital assets and block chain application security. This is a hardware bitcoin wallet specially designed for consumers. It provides enterprise level security hardware moles and hardware procts supporting the Internet of things.
blockchain is not only about issuing money, but also can be applied in many places. The biggest feature of blockchain is decentralization. General Internet procts are centralized, and blockchain can use decentralization to solve the trust problem between each node. Because in the blockchain, information is traceable and cannot be tampered with
now there are many blockchain landing projects. You can properly understand that it is not a simple coin issuing thing, nor a deceptive project.
What are A and forsage
Forsage Dapp🐆 Instead of investment, forsage DAPP is a global shared eth matrix program. It is understandable that it is a marketing company, Ethereum
100% based on smart contracts, 100% open source, not controlled by anyone or a third party, all eth matrix 100% profit rules are always on the chain to seal smart contracts, carry out them continuously, and break the speed of conventional revenue
forsage is a global crowdfunding platform launched in Russia on February 6 this year. At present, nearly 900000 players from more than 30 countries have participated in forsage, and they only entered the Chinese market in early August. Code btshijie
Ethereum global sustainable sharing matrix mode, 0.05 Ethereum can participate in the sermon, everyone has an ID, at the same time, x3x4 two sets of matrix mode at the same time, just play it as a game
summary: X3 matrix, ① point position own, ③ point position slide upward; X4 matrix, ① and ② point position sliding upward, ③ and ④ and ⑤ point position's own, ⑥ point position randomly sliding globally, up and down, left and right randomly sliding nearby, the essence of the mode is here. Code btshijie
I hope I read your title correctly. It's f (x) = e ^ - X. I think it's this one. U = x + y, v = X-Y. the general solution is as follows: because they are independent of each other, so, FX, y (x, y) = FX (x) × FY (y) = (e ^ - x) (e ^ - y), and from the two formulas of u and V, we can get x = (U + V) / 2, y = (U-V) / 2; eth; X/& eth; u& eth; X/& eth; v|
|& eth; y/& eth; u& eth; y/& eth; V | according to the property of determinant, the value of the determinant | 1 / 2, 1 / 2 |
(| 1 / 2, - 1 / 2 |) is 1 / 2 (but it should be noted that the absolute value is added to the value obtained here). At the same time, substituting x = (U + V) / 2, y = (U-V) / 2 into FX, y (x, y) = FX (x) × FY (y) = (e ^ - x) (e ^ - y), then multiply the value of determinant by FX, y (x, y) after x = (U + V) / 2, y = (U-V) / 2, that is, Fu, V (U, V) = FX, y (x-1 (U, V), Y-1 (U, V)) ×|& amp; eth; X/& eth; u，& eth; X/& eth; v|
|& eth; y/& eth; u，& eth; y/& eth; V | = [(e ^ - (U + V) / 2) (e ^ - (U-V) / 2)] / 2
, ah, this problem even let us find the marginal function
X=(U+V)/2> 0,Y=U-V)/2> So we can get u & gt; V,U>- 5. The drawing has (see the picture I uploaded) the dotted line is what we want, Fu (U) =
∫ U-U [(e ^ - (U + V) / 2) (e ^ - (U-V) / 2)] / 2, the one in front is the integral from - u to u (sorry, I don't understand the symbol of this formula very well). This integral will be the result, and since the joint distribution is symmetric, it is OK to replace u with V after finding U