ideal Definition and Topics - 4 Discussions

iDEAL is an e-commerce payment system used in the Netherlands, based on online banking. Introduced in 2005, this payment method allows customers to buy on the Internet using direct online transfers from their bank account.
iDEAL remains by far the most popular method for online payments in the Netherlands, well beyond credit card use, and was used for 54% of all Dutch online payments in 2014. The service processed 4.5 million transfers in 2006, 15 million transfers in 2007, 28 million transfers in 2008, 45.4 million in 2009, 68.8 million in 2010, 93.8 million in 2011, 117.2 million in 2012, 142.5 million in 2013, 180.2 million in 2014, 222 million in 2015, 282 million in 2016 and In 2019 655 million transactions. iDEAL is owned by the Dutch organization Currence, which also owned PIN and Chipknip. As of April 2016, the total amount of payments exceeded one billion.The participating banks in iDEAL are ABN AMRO, bunq, Friesland Bank, ING Bank, Knab, Rabobank, Revolut, Triodos Bank, Van Lanschot and De Volksbank. Together they serve the vast majority of the Dutch online banking market.

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  1. kostoglotov

    Marginal inductance and capacitance of a real wire?

    Speaking just of long straight wires, not loops, coils or solenoids. Ideal wires have no resistance. Of course they would have no capacitance. And real wires have some very small amount of inductance, no? Firstly, would an ideal wire have some ideal nonzero inductance? Why/why not? After all...
  2. T

    Modeling an inductor

    Hi, I'm just curious why we model the ideal inductor as having the leakage inductance as being in series with the ideal core, rather than in parallel to it? Because it would seem to me that the flux goes in two parallel directions, one through the core, and one through the air around the core...
  3. S

    Non-ideal solution and vapour pressure

    When there is a positive or negative deviation it is due to the interactions between A-A and B-B being weaker or stronger than the interactions between A-B. However, are there any scenarios where the interactions between A-A are stronger than A-B while B-B weaker than A-A or vice versa? In such...
  4. metapuff

    Not understanding the isomorphism R x R = C

    Now ℝxℝ≅ℂ, seen by the map that sends (a,b) to a + bi. ℂ is a field, so the product of any two non-zero elements is non-zero. However, this doesn't seem to hold in ℝxℝ, since (1,0) * (0,1) = (0,0) even though (1,0) and (0,1) are non-zero. What am I missing? Also, the zero ideal is maximal in ℂ...
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