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@Jimbo

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Since 06.06.2026

Loss functions in Instance Representation Learning [R](reddit.com)
In Wu et. al, the MLE objective is computationally infeasible due to the high number of images in the dataset. Non-parametric Softmax Negative Log-Likelihood With large n, the denominator in (2) is hard to compute. Therefore, they use NCE (Noise-Contrastive Estimation). The NCE Objective Essentially, they approximate the difficult loss in (3) with the easier to compute loss in (7). However, we end up estimating the denominator anyways in (8). Why not just approximate the denominator in (2) with (8)? I asked Claude about this and it said something about it being a biased estimator, but I didn't really get that. I'm also a little confused on the connection of the original NCE formulation as being a way to estimate density and the way it is used here; do we do this because NCE loss is easier to compute and as m (the number of noise samples) increases, we get the gradients of NCE loss and gradients of NLL loss to match? submitted by /u/No_Balance_9777 [link] [Kommentare]
Did I get scammed on coinbase?(reddit.com)
Long story short I bought And now that I completed the purchase it showed pending from my bank account but not the balance in my coin base account and now it's saying it could be a malicious coin? Tried to reach out to customer service and it's all a chat bot that says payment went through. Should I dispute with my bank? submitted by /u/WoMan-onthe-moon [link] [Kommentare]
Is this normal?(reddit.com)
I was trying to pay for something using bitcoin, and every now and again (more often on the first copy attempt) it would copy a completely different address? I didn't double check the address upon checkout, and the seller says that address has nothing to do with them. Clarification: When copy+pasting this address, whether you use the button, or do it manually, sometimes throws out a completely different address that's (according to him) has nothing to do with the seller. submitted by /u/Fluffy-Suit-3650 [link] [Kommentare]