# Algebra 2 📚

"Algebra 2" is another completely free textbook that covers a significant portion of algebra at both the pre-university and initial university levels. 🎓

With over 1,100 pages and a large number of worked examples, practical problems, and exercises, it covers linear equations, quadratic equations, polynomial equations, rational equations, irrational equations, exponential and logarithmic equations, systems of equations, inequalities, and many fundamental concepts underlying algebra. 🧮

In my opinion, this is one of the most comprehensive free resources for studying equation theory and algebraic methods typically encountered in the first years of university study. 💡

Source: https://openstax.org/details/books/algebra-and-trigonometry-2e

#Algebra #Math #FreeTextbook #Education #Study #University

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Introduction to Deep RL and DQN

Link: https://www.dailydoseofds.com/rl-course-part-6/

🤖 #DeepRL #DQN #ReinforcementLearning #AI #MachineLearning #DataScience

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Optimizing the model's performance through Prompt Tuning with the PEFT library.

✨ Full-fledged fine-tuning of language models requires a huge amount of video memory and completely overwrites the network's weights. We will apply the Prompt Tuning method (retraining virtual token prompts), which freezes the main model and adjusts only a tiny matrix of virtual embeddings. This allows adapting AI to a narrow task using a regular user's graphics card and without the risk of destroying the neural network's basic knowledge.

📦 First, we will install the necessary libraries for working with transformers and effective fine-tuning methods (PEFT).

pip install torch transformers peft

✅ The packages have been successfully installed in the system and are ready for configuring lightweight training. We will create a basic Prompt Tuning configuration for training just twenty virtual tokens instead of billions of model parameters.

from peft import PromptTuningConfig, PromptTuningInit, get_peft_model
from transformers import AutoModelForCausalLM

peft_config = PromptTuningConfig(
    task_type="CAUSAL_LM",
    prompt_tuning_init=PromptTuningInit.TEXT,
    num_virtual_tokens=20,
    prompt_tuning_init_text="Classify the sentiment of this text:",
    tokenizer_name_or_path="gpt2"
)

🔄 The configuration is initialized and links the text prompt to the trainable virtual embeddings. We will wrap the base model in a PEFT container to freeze the main weights and leave only the new tokens available for gradient descent.

base_model = AutoModelForCausalLM.from_pretrained("gpt2")
peft_model = get_peft_model(base_model, peft_config)
peft_model.print_trainable_parameters()

🚀 The model is ready for training, and the percentage of active parameters will be displayed on the screen (usually less than 0.01%).

python3 -c "from peft import PromptTuningConfig; print('PEFT Setup: OK')"

📝 Expected output: PEFT Setup: OK

pip uninstall peft -y

💡 Prompt Tuning — an ideal choice when you need to train a model for many different customers or tasks simultaneously. Instead of gigabyte-sized copies of neural networks, you store only lightweight configuration files weighing a few kilobytes, dynamically substituting them at inference.

#PromptTuning #PEFT #AI #MachineLearning #DeepLearning #DataScience

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If you want to finally understand how neural networks actually learn, I recommend these notes from Stanford CS224N. 🧠

"Computing Neural Network Gradients" explains the calculation of gradients and backpropagation without black-box formulas. 📉

Inside:
• Chain Rule
• Computational Graphs
• Vectorized derivatives
• Efficient gradient calculation
• Step-by-step examples with formula analysis

Many people use PyTorch or TensorFlow every day, but never understood what happens after calling .backward(). 🔥

These notes just fill this gap. 🛠️

PDF:
https://web.stanford.edu/class/cs224n/readings/gradient-notes.pdf

#NeuralNetworks #DeepLearning #StanfordCS #Backpropagation #MachineLearning #AIResearch

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Data Science Interview Questions

💡 Here is your curated list for Data Science interviews!

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